After reaching 3000 reputation points, I've been alerted of the fact that I may vote to close posts with low level quality -- and other possible reasons.
Since that, every time I flag a post, the flag seems to be converted into a vote to close, with the respective reason -- the same used to flag.
After being able to vote to close posts, does one's flagging activity stops, being converted into close votes? If so, how come some people have so much reputation, and considerably high levels of flagging activity?