That’s the thing - since we aren’t building a client we can’t use NIPs that currently 0 clients support. 

The payment/invoicing/DVM part doesn’t seem to be fleshed out yet either. At least not publicly or in a way we could use it yet. 

We started building Creatr in April of last year. None of these ideas even existed. I had to pay for bounties on 4 clients to even implement NIP-42 so I we could even do some testing. Ultimately the project stalled on our end due to lack of NIP-42 support and being busy with other work. Finally decided to finish it a few months back.

We will implement whatever the standards are once they exist and work in the wild (again, our focus is interop) but until then we have to focus on working with existing clients.