What blueeighties said. If you are only adding these people to gain followers, and 500 in a day would suggest that, calm down and just enjoy it. Tag photos and let people find you naturally. Then any follows are because they like your work.
I agree with Phil and blueeighties I have about 90 followers Phil and Blueeighties included I use Flickr for mostly reference and of course for looking through rose tinted glasses.