This is a neat idea, and there may be some enlightening bits of feedback, but it won't tell you what matters, and that is if people, in a specific audience will like the product.

Sign ups and likes are very noisy singals.

There's just nothing that can take the place of market validation, so the 'new standard' model of 'release early' is probably the best way.

Sometimes it takes a while to find the right user base and to get fit.