At costs fixed (e.g. setting up cryptocurrency trading privileges, going through KYC, clearing receiving cryptocurrency proceeds with your bank) and variable (e.g. regulatory, accounting, tax wise, et cetera). To say nothing of volatile, uncertain and likely to get stolen.
This is an example of a good idea ruined by shoving cryptocurrencies where they only add marketing value.
They’re costs. Material ones, particularly if one is dealing with micropayments. A simpler solution would have been batching payments with real money. There is counterparty risk, but given we’re talking about micropayments that’s negligible compared to the risks and costs cryptocurrencies brought to the table.
Cryptocurrencies don’t deserve to be rejected out of hand. But they don’t need to be unquestioningly choked into otherwise-fine products.
That seems like a fair trade-off to me, but it is indeed a trade-off between privacy and usefulness it is one I appreciate though.