I use credit cards pretty much everywhere, mainly for two reasons: I came here as an immigrant, therefore was an adult without a credit history, and AT&T wanted a $500 deposit for a post-paid account (pre-paid it is, thank you very much).Simply because there would be truckloads of profit in it for them and it would be a convenience for some of their customers. I'm not sure how it works where you folks live but around here banks and lending institutions seem to be profitable businesses. Ever finance a car? The business office at the dealership is a profit centre. There's money in lending that could be reinvested into product research and development. As much as everybody loves their Schiit at the end of the day it's another consumer product purchased in the same way as any other consumer product. I would guess that presently the vast majority of purchases from Schitt are with a credit card which means all of the profit from lending went to the credit card company not Schitt. Schitt need not start their own finance company there are plenty of lenders willing to partner with them to share in the profit.
It's not something I would use, I've been debt free for almost 2 decades so my purchases are based on my ability to pay cash. Having said that I don't have top of the line taste so most things are never out of my reach with cash. I don't long for a Yggdrasil, I'm more than happy with Bitfrost level gear. I do understand people's desire to finance consumer products I've been in sales personally for a long time.
Now my credit is excellent, so the only reason left is: cash back. Every purchase I make gives me at least 1.5% cash back, with the right card up to 5%, and I pay my balance in full every time. No annual fee, no interest.
Of course I pay for that cash back through the fees charged by the credit card companies, which the merchants pass on to me.
So what I could see as making sense is Schiit offering a small discount for payments with debit cards, for which the fees are lower. If they pass on less than the savings: profit. Risk free profit.