Why does Sega give their fans more love than Nintendo? :(

[chucklehuck]

I noticed that there are a lot of Sonic fan games out there and Sega doesn't appear bothered by it, in fact, I just recently discovered that Sonic Mania was made by a team of fan game developers who were hired by Sega.

Why is Nintendo more conservative than Sega in this respect? Also, did anyone here ever get in trouble with Nintendo because of that?