This is a policy implemented from Twitter, which strictly forbids programmatically following users. You must select the individuals you wish to follow. We try to make it as easy as possible…

While we do not limit the number of people you can follow in any given time period we strongly encourage you to use some common sense and abide by the Twitter guidelines as to keep your account in good standing.
Twitter does look at such things as following to follower ratios. If you are following 1000 people and no one is following you back Twitter assumes there is some type of spam activity on your behalf and can suspend your account.
We strongly recommend that you go slow and steady with your Twitter follow growth!

The number of posts you can schedule per day depends on your plan. If you need more let us know and we can recommend a plan just for you.