I think the bigger problem is we preach user feedback as the holy grail of product growth, but it's hard to do so when you fully respect privacy (i.e. no sign ups).

For example, when I built https://github.com/pdepip/mmap.it I made the conscious decision to not require any log in information but quickly found I was unable to find who was using my product and then ask them for feedback - so user led development stalled.