Since a few days mappers using GoMap add wrong payment keys.
For example payment:payment:cash instead of payment:cash
https://www.openstreetmap.org/way/374689759
The same is the case with currency:currency:...
https://www.openstreetmap.org/node/5599271228
These tags are added by various mappers all using GoMap - this seems to be a bug in the software.
Edit:
The same with service tags:
service:bicycle:service:bicycle:pump
service:bicycle:service:bicycle:rental
service:bicycle:service:bicycle:repair
service:bicycle:service:bicycle:retail
service:bicycle:service:bicycle:second_hand