If someone I employed said that something “is a full-time job because I need to keep myself familiar”, I’d really have to hold in my laugh of disbelief, to say the least. You’ve taken the “people should pay ongoing for ongoing work” discourse and applied it beyond the degree to which most intend. Even if I wasn’t already using a perfectly adequate and free menu bar application to do exactly this, there’s no chance in hell that I’d ever see an apparent lack of documentation ability as justification for an ongoing subscription for this.

This is all ignoring the fact that you’d very likely need to maintain this application in its entirety to continue scratching your own itch.

I pay for a lot of software, including subscriptions. I am almost always happy to do so. This is a rare occurrence where it comes across as a piss-take.