For boxing related stuff, quite a few people have posted their scripts here and said I'm trying to do whatever.
There are a few people who box primarily with HKN, who have given some technical support.

It is the nature of a user of the product (some very knowledgeable), who are giving back to the community.
I don't think any of them are paid.
Same deal with someone like MiRai making IS Boxer videos.

If you have a question, it doesn't hurt to ask it.