I think you are wrong because this forum are not earning relatives. Here many categorys where many people’s asking and help to each others.
You wrong, you can earn in the forum through
+Selling your own services
+ Signature,avater,bounty
Using the ranking, legendary member take the largest bite of the cake in signature campaign -sometime are equal with hero member- since it takes more zealousness to get there, so the golden answer is work for your earnings.