Some time ago the Armory 3D game engine also had this problem of suddenly being blocked, without notification or reason. The creator exactly solved it like this

Some time ago the Armory 3D game engine also had this problem of suddenly being blocked, without notification or reason. The creator exactly solved it like this, with reoccurring payment, status on the website, and even a one-off donate button: https://armory3d.org/fund.html https://armory3d.org/fund.html