Interesting detail: note how it does not mention or even try to explain what would be allegedly violating the families program eligibility. This is likely part of Google's procedures to tire the devs down.
If the dev is smart they should be capitalising on that nice, nice Streisand effect. "Google uses its monopoly over app store to remove competitor Organic Maps". Remember - against Google you don't need to pull your punches, you can go all out.
I also hope that the dev uses the opportunity to advertise F-Droid. BTW I'm installing this right now.
Honestly, this whole thing is probably because some underpaid and under-trained reviewer just made a bad call, because this doesn't really make sense. I'm sure it'll be restored in a day or two.
When incompetence is systematic, it stops being just incompetence to become a policy.
As in: Google could be paying and training reviewers better. For what? For the sake of a bunch of developers that it doesn't care about, including competitors?