what's the catch?

What kind of debit cards are accepted? Will they ask to connect bank accounts after? Have you ever used this method. Need detailed guide. Do you use debit cards for funds transfers?

Pre-paid card can be a problem sometimes. Debit cards should be fine.

Cards are used as a backup payment method if you have no balance.

They are also required for subscription. Balance will be used first but card must be present.

There are some fees with everything you do there. That's just a given.

I always select to receive it in 1-3 days, no fees and no tricks

Each method has different requirements. Some platforms require linking a bank account after adding a card, while others allow direct card transactions.