[TGH-Adfabre]

I've been playing for a couple of versions now and am wondering if anyone really understands how Fan Loyalty functions.
1) What are the most important positive contributors?
2) What are the most important negative contributors?
3) Is it tied to roster stability?
4) Is it tied to player ratings?
5) Consecutive playoff appearances?
6) Consecutive .500+ seasons?
7) Player stats?
8) ???
I ask because I have seen examples that to me would rule out each of these. I understand that few rules are static and there is usually an exception.

Next: What does it do?
1) Increase ticket sales?
2) Influence FA signings?
3) Influence extension signing?
4) Effect merchandising revunue?
5) Effect away game attendance?
6) ???

I have had a lot of "Theory" conversations about this, wondering if there is someone who is an expert.

Thanks,
LP