And even if you keep your settings clean and watch out that ’ … services to startup on boot’ is not set, you will see often android processes running that you definitely do not want to run and which you definitely did not start at all!
And just taking a look at apkpure download site you are greeted with an advertisement announcement that matches your experience!
BUT nevertheless: I would like to hear from @Jolla why those android processes can startup themselves?
(there were some comments earlier on TJC and maybe more…)