I've always been pretty open with what people do with my content, so anything that includes a link back to my site and the proper credit (mesh & textures) is appreciated.
Ocassionaly some content may have issues in CAS. This does not effect the item when actually in the game. I would never release something that doesnt work properly when in game.
All my files are available in .package format, I don't upload sims3packs. .packages are so much easier to use..