> might mark accounts that use microg as suspicious which could increase the risk of Google banning the account
So what?
As a Chinese the only way for me to connect to Google is through a proxy, and I'm a Firefox user with some privacy settings enabled.
Few months ago I started to notice that Google is keep logging me out of their services, and I had to go through the entire authentication process to log back into my accounts in order to check my emails and do some searches without having be spammed by that capthshitTM of theirs etc, then after few days I'm been logged out again.
Eventually, I got tired of this, and decided "Hey, at least duckduckgo.com won't try to give troubles as long as you use their service normally", so I quickly developed this new habit of not to use google.com. Now I only use YouTube, Gmail, Play Store and sometime the backup service (Google Drive or maybe Photo, I don't care) on my Android phone.
If Google wants to ban all microG users, I'd say that's Great! It was fun Google, thank you for the service.
Plus, can Google actually block a microG user ethically? Using microG isn't hacking or abusing Google service, and "suspicious" is not enough for an account to be blocked, at least permanently.