I haven’t posted here before, but my question was migrated from SO.
I don’t think I got the automatic +100 for linking profiles.
This is how the 100 pts for association works. To get the points, you need to associate your Meta account and your SO account as described on Meta Stackoverflow:
The system uses your OpenID to know which accounts are eligible for associating, so you need to make sure you used the same OpenID on both sites. Bonus points are only given to users with accounts above a certain amount of rep.
That rep amount is 200 pts.
But the system was (is?) glitchy sometimes. So you may need to disassociate and then relink accounts if the +100 points doesn't show up, more details here and how to do this. Also, remember that you need at least 200 pts of rep at the time you make the association in order to get the +100 pts on the other account.