I've participated in a number of schemes aiming at sharing expertise in the past and would be glad to share and get some on your platform but, as others have stated, I think that to see traction, you'll need to specify a business model else everyone will be inclined to "if it's free, you're product" mentality.
I'm not distrusting your current statement of "no data sharing" and, if I may, "won't do evil" mentality but in this day and age, customers will need a clearer statement right on the product page for it to be trusted.
A quick and easy alternative would be "Currently in beta and free for all until December 31, 2018" would probably assuage some fears, with expectation of a coming bizmo, whatever that would be.