To the best of my knowledge no money trades hands between.
Thats irrelevant. Both parties believe that the relationship is to their mutual advantage.
Currensee is aware that MB is engaged in a marketing campaign, they know he pays for advertising on a number of sites. They know that he advertised on TV. They know he has appeared on TV, they know he's recreating the turtles experiment, they know he's actively promoting his products and services via social media, and they know he has a marketing list. You'd have to live under a rock not to be aware of that.
They know that they can rely on MB to publisise any event joint undertaken in association with currensee. A joint event with MB is guarenteed to attract participants, and currensee has the opportunity to market itself to those people. They dont provide a platform to MB out of chartity, they do it because it makes commercial sense for them to do so.
MB agrees to the joint event because it lends him credability by association. Curresee fully understands why MB participates, and they know that they are lending him credability by association, and they obviously consider that a price worth paying. Currensee are not so commercially nieve to believe that MB is assisting them to promote their business because he's a nice guy.
The crux however is that lending credability to an individual or business entity with MB's track record is simply immoral. Currensee are well aware of the facts, but they are happy to sacrifice the interests of their members for their own short term commercial gain.
I critisise businesses like t2w for constantly promoting charlatans, but at least they have the excuse of not having access to their partners trading accounts. Currensee has detailed performance data of numerous traders, and the very least they could do is restrict events only to those traders who participate in their program. If MB wishes to take part, he should be required to register, and required to publically expose his performance data.
The individuals shilling for currensee are constantly bleating about transparancy, but are quite happy to support a 3rd party who has made the most outrageous of claims without a shred of evidence to back up those claims.
As an author you should be well aware that any publicity is generaly good publicity