Best answer by s l i g h t
Also, they re-use the same pictures and names for their bots. Next time you see the advert look at the accounts reposting it. Quite quickly you'll see the same photos coming up again and again. For example:
These photos are all stolen from Instagram. If you see profiles with any of those photos following you, block and report them.
If you get new followers that have no uploads or reposts, haven't changed their URL from the User number, have no profile description and just seem to be following lots of other random accounts don't automatically follow them back.
Also, if the account has a woman's name but a picture of a man or a man's name but a picture of a woman ..... that is a bot. Look at Georgina Perkins in the top left of the picture!!!!