I understant what you are talking about , but I think you won't find a site or service which pays more than some signature campigns in this forum , for example : according to your rank you can earn up to 0.2BTC monthly from betcoin.ag campaign , but for individual rent I don't think you will earn more.
For individual rent, I'm actually earning more than double of that. The calculation is little complicated though.
I haven't seen some members here who are wearing bitcoin betting website signatures and I think you are one of the few who wears it.
And good to know that you are earning more than those betcoin's signature campaign participant.
So it is clear that you are earning 0.4
BTC / monthly from wearing their signature, just kinda tough rate for an individual advertiser.