And tons more. Lots of money in church software.

For real?

Practically every church I've been to in the last 15 years has had an online giving option, and most of them use different platforms from each other, even though all the churches have been Catholic and many of them have been in the same diocese (where you might expect a "best practice" or economy-of-scale-type agreement to have been made that would lead them all to use the same one).

This is very widely done already.

I'm not surprised.

Here is a German company that created a device where you can donate by putting cash into the collection bag or by swiping your card. You can even change the amount by turning the handle.

https://digitalerklingelbeutel.de/klingelbeutel/

Yeah, that's a valid business. I also looked into that. wWould not mind to colaesce with others who think it could be worth to go to sanctuaries/worship palces and try to establish the service. think St. Peter's Square in the Vatican. St. Francis in Assisi, etc. (I am from Italy, but I guess every country has some sort of shrine where everyone goes, turists included)