I agree with you, our long-term goal is to use the approach you mentioned. We even considered it for the launch but thought it is to much work.
But I realized that it worth more to make it as easy as possible to try out a web app, if you ask for feedback.
So for the future and if possible I will do it differently.
Thanks for the feedback, for now we are pretty happy with the engagement of the landing page.
Thanks for the feedback, for now we are pretty happy with the engagement of the landing page.