It's very similar to companies that hide their entire page between a modal dialog until I sign up or sign in with Facebook. This forced method of handing over

It's very similar to companies that hide their entire page between a modal dialog until I sign up or sign in with Facebook. This forced method of handing over my information generates zero trust in me. In fact I think this is very slimy. What don't you demonstrate your value to me first before I give you my info. Earn my trust. Don't just claim something. At least give me SOME proof of your value before asking for my info.