you can get it from GitHub:
https://github.com/supertuxkart/stk-code/releases
and you can use obtanium to automatically update it (or any apps from GitHub/ the web)
From Wiki:
Brave Software was founded in 2015 by Brendan Eich, creator of JavaScript and former Mozilla CEO who left the organization after coming under fire for his support of eliminating the right of same-sex couples to marry […]
and
In August 2016, the company had received at least US$7 million in angel investments from venture capital firms, including Peter Thiel’s Founders Fund […]
Should tell you everything you need to know.
I’d say being ‘privacy focused’ is just a stick to get non-tech savy/gullible people that want to protect their privacy to use it, without thinking about it twice. Personally, I believe there is 0% chance they don’t sell (or simply give) all data they can to Peter Thiel and Palantir.
If you press show all assets, there is an .apk for each release as well.
its called SuperTuxKart-[version].apk, doesn’t have android in its name