It previously used randomized urls with no registration required and the #1 request by a huge margin was that people wanted to feel more secure before beginning to type in their biz model and that registering would achieve that.
No tradeoff needed. Let me try it with fake data without registering. Which is exactly what I planned to do. Until faced with the registration page, whereupon I fled like the morning dew.
We live in a world of trade-offs.