Many Instagram biographies now include the words ‘no ghost followers.’
A ghost follower is someone who never interacts with you. That might be someone who has left Instagram. Or it may be, much like you still see on Twitter, Instagram users who follow huge numbers of other users en masse with the aim of in turn acquiring a big follower number.
Popping is Instagram speak for getting on the popular page. Doing so generally depends on having a large number of likes and comments in a very short (less than 15 mins) period of time, hence groups exist to deliberately members “pop.” In addition to having a concentrated number of likes for each post, most Instagramers believe that a smaller follower total gives you an advantage.
As a result, there is no benefit in having an artificially large follower number that is exactly that – just a number.
Though most brands now do understand the importance of a committed follower, the philosophy of the big number is still alive and well. By contrast, its interesting to see a group of core users of a social network embrace the concept of (as the IGexorcist site puts it) people over numbers.
— Instagramers get rid of the ghosts