Even with 5000 profiles, I've found that I rarely have merge requests, questions or requests to put on the trusted list. For the trusted list, I have had a grand total of 3 people with requests.
As far as merge requests to me, from other people, I would guess, perhaps 15-20 in total, since I've started.
Not sure why.
The one sad part is that I have connected up with a number of other people's profiles and most of the time, they never acknowledge it or even thank me.
Honestly, I feel like I'm the only one out there sometimes.....