How do I know if this is a scam or not?

Just got this PM:

If it looks like a rose, smells like a rose, etc. This screams scam to me.

Although, If I just sign up as a CPC Advertiser - I'm only paying for clicks, right? Obviously it could be some kind of scam where they commit click fraud and I have to pay a bunch of money, but other than that, what do I stand to lose?

I've only signed up with Google so far (AdWords) as an advertiser, so I'm pretty new to this.

My first inclination is to sign up for and advertise with any CPC network I can find to maximize exposure, but I'm sure that opens me up for some bad things.

Other than the obvious click fraud, what are some things I need to be on the lookout for?

Can someone tell me why this might be a bad idea?

 

It was poor form of me to include the URL, and I did it unthinkingly.

My respectful apologies.