Sure, but it sets the precedent that this kind of behavior is both desirable to the advertiser and permitted by the forum. I suspect we might see other, larger, campaigns start to ask for similar posting requirements.

For a good poster, it might not be a problem, but we know that ~90% of bounty spammers aren't good posters. Most will open threads which have been discussed 100 times before, or are simply legalized plagiarism in the form of stolen content with a link at the bottom.

We also know that bounty spammers don't just see their posts being trashed and accept it. Any thread of theirs which is trashed will simply prompt them to create more so they can still hit their quota.