I think sign up for anything is a tall order. To use a recommendation site I would need it to just start asking me questions and immediatly also start the process of visually narrowing down content suitable for me. How many ratings from me would you need to do a good rec? Is there diminishing returns after certain amount of data from the user? There should be zero barriers of entry to this kind of thing. Like quirky website you click for few minutes. You can always provide ”save your answers” button and have the sign-in flow there, although I would appreciate unique link I can bookmark more.

And this is how we ended up with tinder...