You can ask these questions in Service discussion board because those questions are not related to the forum, but signature campaign and management.
I have seen campaigns where participants of different rank are being paid the same amount and in most instances the hero/legendary
I really want to know why some campaigns don't give this due diligence and others does and what is the reason behind it?
Some campaigns pay same rate for Senior member to Hero member and Legendary ranks. You can easily see that from Senior member rank, signature space are the same or nearly the same, and it's reason.
However three ranks have different limitations in their signature like total characters and some minor differences. It results in different pay rates in some campaigns and you can see companies and signature campaigns are free to set their campaign terms and pay rates.
There are changes on Newbie, Junior member ranks years ago and now are different than the following quote.
Perhaps the allowed signature styling should change with activity score / membergroup. Like:
- Newbie: No styling (including links) allowed. Max 40 characters.
- Jr. Member: Links allowed. Max 100 characters.
- Member: Unlimited length.
- Full: Color allowed.
- Sr. Member: Size allowed
- Hero: Background color allowed