Amazon took off well before the smartphone era. Bezos was Time Magazine's Person of the Year in 1999.
I don't understand what you mean re: debit cards. Is it that the transaction processing fee is passed on to the customer? That is already well understood. The issue is that crypto is nowhere near to matching VISA/MC's per-transaction cost.
I don't understand what you mean re: debit cards. Is it that the transaction processing fee is passed on to the customer? That is already well understood. The issue is that crypto is nowhere near to matching VISA/MC's per-transaction cost.