If there is a big enough AI project out there, especially if it will be released as freeware, others won't work on it. That would be high-risk and result in a low return on investment.

Three ideas to prevent unfriendly AGI (Scroll to "Help good guys beat the arms race")

Also, I don't think my other two risky AGI deterring ideas aren't do-able simultaneously. Not sure how many people it would take to get those moving on a large enough scale, but it's probably nowhere near as much as making a friendly AGI.