Any Professional Forum Posters?

I'd like to choose the most professional forum posters for my new forum.
Have done a search I found paidforumposting.com - What can you say about them?
Any personal experience dealing with them?

Often the designated shill will post a few times with innocuous comments to get their post count up on a forum before sliding in a very subtle ad. Places like this can also pay for an established account of a major board, so that the advice to buy product XYZ will seem more trusted. Of course sometimes it's an account that's created for the express purpose of spamming and nothing else-- usually these will post a lot very quicky, knowing they're likely to get shut down quickly on a board with good moderation.