John Ward@GEvans have you seen that Amazon recently opened up a subscription model for self-publishers? This would allow you to offer paid subscriptions via Amazon to people who read on Kindle or via the Kindle app. It might be something worth looking into if you're interested. Here's the link:
Gary Evans@jlward Cool! Thanks! Sorry for the delay in replying. I strongly dislike how notifications and post threads work on Mastodon. If I don't actively look for them, then it's easy to miss them altogether....