I'm not sure if there is a term for following someone on Twitter just to get them to click on your link but I'm suggesting the following:

Spamollow: (verb)

1. To follow someone on Twitter for the purpose of getting the user being followed to click on a link they would not otherwise in their worst moments of depravity or boredom click on.

Spamollower: (noun)

1. One who spamollows.
2. A parasite.