Worth acknowledging that GitStart has, at least in the past, submitted PRs to open source projects unsolicited in an attempt to bolster their reputation.
We found their PRs to be of extremely rough quality - exactly what you would expect from junior offshore developers - and it took up a non-trivial amount of our time to deal with the contributions and get them into a state where they could be merged. We would also often find 10+ email addresses associated with a single one-line change commit, which I found quite odd.
While I/we encourage contributions from developers of all levels, it felt super iffy that we were investing in coaching the junior developers of the YC/VC-backed startup, only for them to use us for cred.
In the end I believe we blocked GitStart from our repo.