A lot of the problem is that many people seem to treat Twitter like a game where the aim is to get the most followers. People agree to follow back if you'll follow them. Therefore you get the ridiculous situation where people have 5000 followers and are following 5000 and obviously nobody really gives a damn about what anyone is saying.

Now when I'm deciding if it's worth pushing the app to someone on Twitter, I check if they have a rational following to followers ratio.

Even when following a normal amount of people on Twitter, the sheer amount of traffic means that your link will probably get lost in the feed.