Requiring to use proprietary software for ability to receive non-cash payments if you are a grocery shop, for example. In my country (my opinion is that was a result from previous statement) it has been grown to requiring to use proprietary software to receive even cash unless you are grocery shop in villages or in mountains or you are not a shop but a bazaar seller.
If somebody is interested in my opinion, next we are going to experience a requirement to use a smartphone like we have a requirement to have some plastic|paper documents.