Auto poster Facebook Groups

Hi,

I found this tool https://www.pilotposter.com/ that allows you to set up a schedule on how often you want to post something on different FB Groups. Of course it doesn't use the FB API.
I have to implement something similar and 100+ different people with different accounts will be using it.
I could use selenium, but the issue here is how to prevent FB from blocking the App, since 100+ accounts will connect from the same IP. I thought to use proxies, yet it would be easy for FB to realize that different accounts are now using connections from all around the world and they are only posting on FB groups.
Any idea how the people from pilotposter implemented their app?

Thanks

you could use different user agents for the accounts, it's a little tricky but doable and you could also save sessions in a folder so facebook will not require login every time which would make it a little less suspicious.