Ask HN: Chat roulette for devs with side projects?

Where you could live stream with someone with the explicit idea of having them spend X (2-5 min) time trying your thing, taking instruction, providing feedback, whatever for that allotted time. For every slot you receive, you also must give back time to someone else. Why? Because it's hard as hell getting any kind of organic eyeballs on a thing if you have zero following.

Does such a thing exist? Would others find this useful?