100 Twitter followers in 24 hours, just by following people
I created a Twitter account, followed 400 people, and got 100 followers in return. That's a 25% conversion rate-- maybe this is normal, but it seemed really high to me.
However if you are trying to get a lot of followers to get paid to promote services, then that is the way to go.
1) Following too many people erodes the value of your Twitter stream, its better to be invested in the people you follow. You'll get a lot more out of the experience. 2) Your followers won't actually be as engaged as they would have been if they had found you though more organic growth. 3) I think people tend to judge accounts that are following way more people than follow them...but maybe that's just my own bias.
Though if you do use those tools, your twitter stream will be full of stuff you really might not want to read.