Unfortunately the people they "serve" would get nothing as nobody can afford to lend to a bad credit risk at reasonable rates. Of course a lot of what they are selling are luxuries that people with bad credit shouldn't have, but then we have to ask what the alternative is. (most places have terrible public transit so you have to get such people in a car. You don't need a TV for movies but you can't really live life without internet anymore as many forms assume online and the alternatives don't work well)
A lot of companies, most, will leave marginalized people behind explicitly to avoid developing solutions for their edge cases. "We don't want those customers." It's come to the point where they try to exclude them up front by requiring 2FA via SMS to establish accounts.
It's hard to argue against that. I suppose it's not that they even exist, it's just the unreasonable amount they profit on the items. If it's purely because they cannot attain items another way, they markup should be more apparent maybe? It just hurts seeing young and disadvantaged people being taken advantage of.