I designed an entire game around multiplayer and then when I finally clicked export it said that multiplayer was not in the free version or I needed to remove it from the project to export. maybe make it so you are warned that it's a paid plugin so people don't make an entire game around it just to find out it is paid (not saying its bad or anything just saying that there should be some popup or something telling you its paid)
I do plan on buying the paid version soon