I was rejected 2 times by reputed trackers while applying for the invite. I was rejected for using IPT sister sites as ratio proof, Note: Not IPT, I said, IPT Sister site. SceneTime, TorrentDay for example. They said, They don't accept IPT and it's sister site as proof or example or good buffer.
So yeah, After being rejected, I opened this thread for clear information. So, I'm living proof that @4nc1n3t is right about it.