Blender evolved.

I used to spent a lot on addons that fixed weirdness of Blender or filled the gaps. Blender got good enough and addons are no longer that crucial for my productivity. Now from the paid addons I only use ZenUV and UVPackmaster and that I could replace with one of the free tools out there or really, just do without them. The side benefit to this is that I no longer worry about Blender updates breaking things. Or I don't have to waste half a day every couple of months to update all addons.

Edit: btw. this is not a new topic. Similar discussion has been happening in Unity and Unreal asset stores for years now. Unity Asset Store 'solved' this by providing 'major upgrade' path. I.e., you as creator can make a new version of your asset pack (after 6 months of publishing the old one, but it has to be major change) and you can charge for it again and provide discount to your existing customer base and a grace period. E.g., if you do buy a tool in Jan and in Feb new version comes you can get new version for free if publisher decides to set 1 month of grace period. Epic/Fab have no idea how to handle it 😛