My rep on SO went up by 50 just after the site was offline. It says that I get +50 for the question Object Technolgy / Object-Oriented Technology implemented in Relational Databases (deleted, 10K only) but I clearly didn't.
You had previously offered a 50 point bounty on that question, which the system seems to have refunded you when the question was deleted.
There's a related Meta question asking about bounties on deleted questions, but it doesn't currently have an official response (although Shog's answer to another bounty question suggests this is status-bydesign).
Update: As of February 13, 2018, the bounty reputation is no longer refunded upon question deletion if the bounty awardee gets to retain it (because it scored +3 and was visible for at least 60 days).
Maybe it only refunds for questions preserving the reputation in the first place i.e. score +3 or more and visible for at least 60 days prior to deletion? That's the case with my question and this one as well. Mar 19, 2013 at 20:50