0 Follower problem on Twitter is being addressed. I checked out their Status site and saw the following post for Tue Jul 28th
Working on missing followers for recently joined users
If you’ve joined Twitter in the past week, you may be running into a problem with followers. Specifically, some recently joined folks have reported losing their followers or have reported an inability to be followed.
We’re actively working on this problem and hope to release a fix soon.
The accounts in question for me were definitely new accounts. I’m glad the problem has been identified and is being corrected. Hopefully, we’ll get the follower count returned to what they were.
Here is a link to the post at Twitter Status.