If you're worried about the platform and the project's sponsor colluding to do this I would think reputation risk and lawsuit risk would pretty easily be a deterrent for that.  

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@Justin Hamel, to get the @ symbol to work properly to tag someone, you have to choose the name that pops up in a prompt near the bottom of the page after you type the symbol and the first few letters of the persons name. 

Choosing not to invest because of irrational fears is not a good idea.

Just wondering what makes contractors choose one client over another.

It has a lower rate, similar to that of a primary, and once acquired, I can do whatever I want with it, including rent it out should I choose to. 

They could be so annoyed they choose not to deal with you ever.

You are probably in a good place and your reputation and contacts that could help you.  

These people are very public and have a reputation, so I'm not nearly as concerned.

Take your time choosing.