Maybe they have one customer in 2 weeks who pays with bitcoin.
Because of this, they forget to log in to/charge the point-of-sale device at the start of the shift.
“Bitcoin is down today”.
I witnessed many foreign Bitcoiners in El Salvador paying with fiat credit cards even in Bitcoin meetups because of their 4% cashbacks, and I can’t blame them.
Bitcoiners should come up with better incentives for merchants to offer it as a means of payment.