I don’t know if you mean a C++ related plugin, but you know I can’t actually make plugins, I can’t program, blueprints is my salvation… 
I have thought about possibly doing some blueprints to share, but I have to be sure I can support it which right now, I don’t think is possible at this time. Basically I don’t want that to take time away, which it can, very easily. I’ve done some models for the marketplace and that is just much easier to support and I have enough experience to be confident about it. I think with blueprints there is a greater responsibility and my confidence level of giving something out into the world is much lower. I happily share my game’s progress and show some blueprints and stuff here and there though. I like to share things but I can’t really make things public that requires some level of support after the fact, free or otherwise. I mean, even if it’s free I feel that support needs to be there, constant updates… etc.