Please correct me if I am wrong but I believe the answer is yes. However there are campaigns out there in which the managers only look at the number of posts in the profiles, so it is clear that they are not bothering to read any of the posts. Should those campaigns be allowed? Does anyone know any of those campaigns?
When 90% of coins are scam and every token/coin has no monetary value until it hits an exchange, it is free promotion for the company. If there ICO is success then you don't mind in giving 2% of token as advertisement budget, if it is failure, company is still giving its own worthless token.
Manager can help in preventing spam but I think the exact requirement of companies is to get as much advertisement as possible, so they will allow anybody (whether that person spam) because its cost to company is still 0.
I think if it become rule that all bounties will be paid in bitcoins only (or any established list of Altcoins.) , I assure you then you find these managers more proactive, most stringent and will be automatically dropping the spammers from their campaigns.