I believe so too. Most of the folks got banned during protocol change. I wasn't using Yappari at that time though. But followed the thread. What I saw that most of you guys tried registering again and again until there was a fix. Even when people here suggested not too and even WhatsApp itself. Right now I can only say that if you get unbanned then try not to register too many times from Yappari or else you will surely be noticed. And if there is a protocol change again, then everyone just stop using Yappari until the fix. I also believe that communities one wrong move can lead to the downfall of Yappari.

So. be cautious, smart and patient.