No relationship to the author, but this makes it into running a commercial service. So, at a rough guess you need: - Some kind of company entity for all this

No relationship to the author, but this makes it into running a commercial service. So, at a rough guess you need: - Some kind of company entity for all this to belong to, possibly a LLC, and all the associated paperwork that goes with it. - Bank accounts and some way to handle card payments - Some level of requirement to provide customer service/support, at least for billing related issues - Have to now also deal with card fraud, refunds, disputes, charge-backs - even if you use some service that will handle most of it, you'd still need some level of involvement - Have to handle billing related tech stuff - issuing bills, ensuring accounts are activated/deactivated based on billing events - And now you need to charge enough to cover all of the above, and your time, and the time of any professionals involved in the above Starts to sound like at least a part time job. The OP may not want to go there. For my personal projects that I provide as a service to others, I do them for the fun of it. In the past I've bailed or cut access to them when they've started to feel like a job.