I appreciate your input, but I personally don’t think that this is an issue for two reasons:
1) Selling plugins violates the EULA
FROM SECTION “OWNERSHIP OF OUR GAME AND OTHER THINGS”
Any tools you write for the Game from scratch belong to you. . Modifications to the Game (“Mods”) (including pre-run Mods and in-memory Mods) and plugins for the Game also belong to you and you can do whatever you want with them, as long as you don‘t sell them for money / try to make money from them. We have the final say on what constitutes a tool/mod/plugin and what doesn’t.
2) Sponge doesn’t allow paid plugins as said in this post.
I don’t want this thread becoming filled with discussion about paid plugins. Anyone replying should not include something about paid plugins or earning money from plugins.