I can say just that I joined Mixin safe review where I got 0.003btc upfront but I reviewed after Recieving payment and same with Utopia review.
What's the point to run away with only 0.003 BTC when you have an opportunity to make more money?

Neutrel is enough to think about any deal for Compaign manager or any deal maker.
You're asking people to change their feedback from negative to neutral, but you've said this before.
Everyone is free to give any feedback
If forum allow then what is problem to other users?
The forum also allow scammer and cheater, the problem raised because there's no human want to be cheated or scammed.
Even if was original owner the chances of holding key for long term would be very low.
This is just your pure assumption, what about you bought this account since 2015 and turn active in this year, which mean 8 years old. The chance you hold password in this account would be very low isn't?