Usually, I have used simple margin, but Binance has raised significantly USDT  margin from 0.03% to 0.055000% Last month.
I just search for other alternatives to buy crypto on margin.

Is there any good site that comperes margins on-line? There are big difference between 20+ or 10% interest rate yearly basis.

Seems like futures is good for trading not holding, because they take after 8 hours great chunk of commissions.