In a way it can be seen as a "bot" since how it works is like what feed bots are doing.
Regardless, groups are by nature "boosters" even in silo SNS. Example, FB groups pushes group content to people's personal timeline/feed.
It's similar to how mailinglists work. You send an email to the group's mailinglist address and then it gets boosted/sent to everyone subscribed to that mailinglist group/address.
So, yeah, technically "bots" since its automated forwarding.