I do not know, specifically, what caused them to reverse it. Then again, I don’t know what caused Twitter to mislabel my site as spam in the first place, although I was certainly ready to hazard a guess. But it has been resolved, to my satisfaction; so let us speak no more of this matter.
No, really. One of the dumbest things that people do on the Internet is not leaving well enough alone when they’ve won something. Problem discovered, problem solved, now it’s time for a respectful ‘thank you’ and a brisk disengagement from the fray.