Win or Nothing

It seems to me that recently my rally has been challenged very few times compared to what usually happens to me. I'm getting either a lot of victories or just nothing at all.  It is because people are unwilling to challenge my rally (too OP?) or is it because they can't even see my rally? I've been crushing all PVP challenges up to 5 PL's higher than me, the only problems I have are with >PL 80, because they get one more hero than me. Not fair! :/