In DK (possibly EU) we have laws that mandate the actual total minimum cost to be prominently shown when you buy something and companies are regularly fined by the marketing board for misleading information there.
So if you buy a $1 cell phone, but it requires you to sign up for a 12-month $50/plan and oh, there's also several $5/month fees in small print -- then that's the total minimum cost you pay must be shown
For loan type products, the effective yearly percentage cost for the loan must be shown. So if you look at one of those typical "quick loans" like https://folkia.dk/ where everybody can get a loan..., well you an see that borrowing 3000 DKK for 30 days is going to cost you a yearly effective interest of 987% if you asked a bank for it.
While that helps in a lot of cases, I don't think it would here: the minimum cost is not any higher than the one pair of shoes, because there's no required contract period, and you can cancel immediately. The scammy part is that this isn't made particularly clear at all, and so people end up unwittingly paying for months of a subscription before they realize and cancel.
So if you buy a $1 cell phone, but it requires you to sign up for a 12-month $50/plan and oh, there's also several $5/month fees in small print -- then that's the total minimum cost you pay must be shown
For loan type products, the effective yearly percentage cost for the loan must be shown. So if you look at one of those typical "quick loans" like https://folkia.dk/ where everybody can get a loan..., well you an see that borrowing 3000 DKK for 30 days is going to cost you a yearly effective interest of 987% if you asked a bank for it.