I have no problem paying for a service I have enjoyed and appreciate, but I do wish there was either an option to migrate from custom domain to a Gmail email address or alternative billing.
The use case I have is for email hosting for family and friends. I would like to see something besides per user. Either a storage / transaction billing or a subset of the GSuite services.
I finally got notified by them about this. I had wondered if perhaps I was an exception.
I, too, am pretty happy to pay for the service. I only have two accounts on it, and since one is really just the catchall that I use to give out fake emails, I can probably condense it to one. (Spam is not the problem that it used to be.)