The serious answer is that you'll notice I said I don't
need debit or credit cards, but they're occasionally useful. An inference of that is that I have them. However .... neither have been used for months, and I don't carry them around with me.
An alternative answer is ... prepaid cards.
Another alternative answer, though true, is that I don't remember last time I bought anything from Scan. Why?, Firstly, I avoid online buying wherever possible. Second, regular travel to a client in Stoke/Newscastle-under-Lyme puts me, oh, 10 mins from OCUK. Third, I have a REALLY good small, local supplier who nearly always matches both for price, and when he doesn't, the margin is small and I don't mind paying it. And fourth, you nay have seen my arguments in the past that a PC is just a tool for doing a job, and that the PC I bought (well, built from bits, some bought and some I already had) some years ago is perfectly adequate for doing everything I need of it, despite being kinda ancient by modern standards. I don't buy a new set of spanners every time something shiny comes out, when the current slightly battered, oily and lightly worn ones still do the job perfectly well.
Expanding your specific point to a more general case, the reason I said cards were "occasionalky useful" was for things hard to do without. The obvious example is car hire and hotel bookings. But, for personal reasons, I don't travel that much these days, and when I do go away, it's nearly always to a place where I have both house and car waiting fir me, so I don't need car hire or hotel reservations. It
could happen, but hasn't for .... well, quite some years.
Over recent years, I have slowly simplified my life, step by step. For those same personal reasons I mentioned earlier, I'm reverting to a lifestyle reminiscent of the era of my childhood. Or putting it another way, stripping away most modern distractions down to what really matters - roof over head, good food, family, comfortable and warm clothing, and a moderate degree of home comforts. For example, no mortgage, no debts, absolutely no need for credit or desire to have any. Most utility bills can be taken care of by one annual payment, in advance, so I can sort out bill payments for gas, electricity, water, etc, annually in advance, in one go. Add necessary insurances to that. Cellphone? Strictly PAYG and rarely used, so I stick a few quid on it about once every five years. Council tax? Pay the bill for the year when it arrives. Yes, it means foregoing the interest I'd earn by keeping the money in my account for the year, but these days it's so minimal as to be irrelevant, and besides, is a price worth paying for hassle avoidance. I just keep a tally on balances when bills arrive, typically quarterly, to make sure I don't drop into arrears.
So, almost regardless of what might be substituted for Scan, I typically either either don't need it, or buy locally not online/mail order, or already have what I need.
The funny thing is that sone people probably regard that kind of stripped back life, albeit with adequate modern help in gadgets, but absent the horrid buzz of 24/7 contact, cellphones, social media, etc as paradise, while others shudder at the thought of being separated from their cellphone for more than 10 minutes. I'm in the 'paradise' group.
I watched a program recently called,
IIRC, "Stripped Bare". It had three 'households', a girl living on her own, a bloke and a girl house-sharing, and two blokes and a girl house-sharing. And they were, other than the roof over their heads and very basic foodstuffs, "stripped bare" of all their possessions. And I mean "bare". Not a stitch of clothing, not a stick of furniture. Even washing machines, TVs and all the curtains were removed. They left the paint on the walls and utilities turned on, but that was about it.
All, and I mean ALL their possessions, were removed to storage containers about half a mile away, and each day (of the 21 day experiment) they were allowed to retrieve ONE item. On day three, after the weekend, they all had to go back to work, with ONLY what three possessions they then had.
Oh, and among the possessions removed was their money, wallets, bank cards, etc, so no sneaking out and buying a whole new clothing collection.
Challenge number 1 was how to get to their possessions, after the first day, half a mile away, butt-naked. One remarkably able girl made the dash by grabbing a bit of cardboard from a nearby bin, once she got to it, then retrieving a large roll of cloth as her item (she was a self-employed clothes designer). Will little more than her teeth and nails/hooks in the wall where her pictures had been removed, she made her own basic clothing, including twisting some cloth into a sort-of rope, and making basic rope shoes.
It was VERY interesting watching each victim agonising, especially in the early days, over WHICH single item to take, each day. And it seemed .... cathartic.
Anyway, my point is that being deprived of everything made them think very hard about 'want' versus 'need'. And after the 21 days, they just about all decided to "declutter", some very drastically. One decided that checking social media every few minutes was a huge waste of her valuable time, and she deleted most. One lad, in the group of three, decided he liked not having TV as a distraction because it meant he spent more time with friends, etc, but his flatmates overruled him.
I've gone through a similar sort of process, but much, MUCH slower. It's evolved over years .... and didn't involve much wandering around butt-naked. Not in public anyway. For which neighbours ought to be highly thankful, and that's another story anyway.
So the real answer to "buying from Scan" is .... pretty much, I don't, because I don't need to. Or even want to.
Sorry Josh, but you DID ask, didn't you.