Well, first of all you should spam forums, as obviously this is the most effective method of marketing.
Then when you have some responses, you receive the money and the investor waits to see what happens next.
When you go quiet, they then try and contact you again - only to find that you were using a free email address that you have now abandoned, and that there never was such a company in the first place.
Leaving the investor totally out of pocket for their stupid naivety for trusting an anonymous invite for their savings in a public forum.
I believe that's how it goes.