This discussion is certainly a good initiative, but somehow everyone missed it, and it is worth mentioning that you are running the only one campaign whose payment rate is expressed in Bitcoin. The large fluctuation in the value of Bitcoin has led to the payment rate being fixed for USD, but still, this is a Bitcoin forum and full respect for this kind of support.
It reminds me of some past time.

Check again, the campaign payment is not fixed to USD yet. He only made slight changes in the payout due to high BTC price. It is still BTC based campaign.
That is OK, however a Hero/Legendary signature space cannot be compared to that of lower ranks, and there is a reason for this. There is also a reason why most clients are no longer interested in member and full member rank signature spaces.
It's acceptable, but for the forum's longevity and well-being, motivation must be given to lower ranks.
None of us started as a legendary member.
Most of the time, lower ranks develop conspiracy theories about higher ones. They tend to believe that the forum is meant to be used by higher-ranked members only.
I have involved in this type of debate in the past, but I was told that the reason higher ranked members are given higher pay is not necessarily because they make better posts, but because they have higher number of posts made in the past. I wonder how this add up to the project owners.
From my newbie days, I have known yahoo62278 to be a manager that gives even a member rank opportunity to earn in the forum. It is not a bad legacy, worthy to be maintained.