Speaking of examples, imagine a football club that has signed a sponsorship contract with Adidas, and then one player goes out on the field wearing Nike football boots.
A much better example would be a football club sponsored by Coca-Cola, and the football player puts their bottle away during an interview

But since there is no bad publicity, this got them much more attention and thus brand exposure than they would have gotten any other way.
They say there's no such thing as bad press.
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I get why people post for coin but financial incentives can really degrade post quality from most (but not all) users here.
I think some definitions to a "quality" poster should have a good merit to post ratio while participating in these campaigns, character count and post count shouldn't be the defining metric of your payouts. But since it is, majority would/should be considered "shilling campaigns"
At the same time , a lot of post are skipped on merit.
I treat merit as a Like, acknowledgement, or a genuine article with merit post.
Enforcing merit on campaigns could lead to more merit cycling so there is definitely pros and cons to a merit approach.
I saw some quality posters apply for campaigns this last week that seem to have been skipped in favor of lesser known individuals, I think campaign managers could hire enforcers, like a %100 bonus to an enforcer that identifies shit posters in each campaign , especially campaign managers running 2-3+ campaigns.
This would lighten the load of the manager and potentially save the manager/campaign money and increase post quality.
My 2 Satoshi fwiw