The campaign manager doesn't have to endorse the business he is advertising.
While indeed there are quite a number of red flags with that business, Gianluca's main job is to ensure the advertisers/users in the campaign will get paid correctly.
Now, if the company indeed scams, if the campaign still continues, then there's a problem for Gianluca and the people wearing the signature.


Until then, like in any modern legal system, we may have to offer the benefit of the doubt...