The reason for that is it's search actually works, it displays live traffic info, and they have a simple easy-to-read privacy policy: https://www.magicearth.com/privacy/
Would it be better open source? Yeah, for sure. However, as far as I can tell, they abide by all the licencing terms for OSM, etc.
I was in remote NZ without reception and we used it for navigation/routing. It wasn't the most efficient and Google disagreed when we finally got signal back, but it got us to where we wanted to be and the map was up to date enough.
I'm trying to keep my phone as de-Google'd as possible.
That said, the one thing I miss from proprietary Android land is Google Maps so I am very interested in a comparable alternative. I'm trying Organic Maps at the moment, and had played with OsmAnd~ but found it lacking when I tried to use it for real-time navigation while driving.
Do you get many apps that complain about not having Google Play Services installed? Just had one (not Magic Earth). Seems to work fine after I hit "OK" to dismiss its message. I'm assuming it only requires it for auto installing updates.
[1] - https://microg.org/
In addition to all of the above, Maps.me has had a pretty ample userbase for a long time now - while it is technically an open-source codebase (to the extent its even been forked & put on FDroid), its privacy policy & general Russian links of the company behind it still leave a lot of red flags for your typical OSM users.
Interesting case of why developers may prefer open source: company was sold, but code was open to legal reuse under a new brand.
As for organic maps, I tried it a while ago and it gave me some rather annoying directions. Maybe they've improved their route finding algorithm since then but I'm not feeling motivated to try it again just yet.
Please speak for yourself :) OSM contributor here: I'm already happy if there's a great mapping product that uses open geo data, might not use it myself if it's closed source but it's better than google keeping everything to itself or behind a paywall. I understand it costs them money to keep their map up to date, but they could also collaborate with the rest of us and have free geo data for all. Apple taking OSM data for their devices, for example, is to me exciting rather than "not sitting well". I'd be ten times as thrilled if they'd open source it, don't get me wrong, but still
https://wiki.openstreetmap.org/wiki/Comparison_of_iOS_applic...
Counterexample: Mapbox [1]