This is understandable. But I've personally never got any malware from third party app stores and I've used many.
Google Play Store app rejections up 55% from last year, app suspensions up 66% https://www.zdnet.com/article/googl...s-up-55-from-last-year-app-suspensions-up-66/
Google Play security improved by targeting repeat offenders https://searchsecurity.techtarget.c...curity-improved-by-targeting-repeat-offenders
i think they are under external fire after the latest investigations and need to act. beside play store i also use f-droid apps or like adguard premium a trusted vendor. when not in store i save several apps offline and i use VT to verify a while after saving. and sometimes like the past few day i view my installed apps a clear some out, away 4evar. background was a too fast draining accu without reason.