I don't agree with that strategy. This isn't a SaaS company where they're actually resource constrained in terms of server capacity.
Chime has been under development since at least October 24, 2017 [0] and there's no ETA on a public alpha/beta/GA.
Assuming that the poster is (one of) the author(s) of Chime, they shouldn't post this until everyone can download it. It can be alpha/beta software, but to post what amounts to a handful of screenshots is pointless in my opinion.
As someone who spent some time on support, I can sympathize with their closed beta. If you reach too large an audience before you're ready, you could end up treading water because you spend too much time responding to similar bug reports and feature requests.
Chime has been under development since at least October 24, 2017 [0] and there's no ETA on a public alpha/beta/GA.
Assuming that the poster is (one of) the author(s) of Chime, they shouldn't post this until everyone can download it. It can be alpha/beta software, but to post what amounts to a handful of screenshots is pointless in my opinion.
[0]: https://twitter.com/chimehq/status/922905555013947395