That is called "warming up" spammer accounts, a technique most spammers use and the warmup method and timing will vary by the intended use. Some spammers don't

That is called "warming up" spammer accounts, a technique most spammers use and the warmup method and timing will vary by the intended use. Some spammers don't really know how to do this correctly. I did something similar to this a long time ago on IRC when channels would be operated by "power trippers". I made a bunch of accounts spread out over months, then would slowly join them to a channel with a power-tripping operator. When they would kick/ban myself or others for disagreeing with a statement, a warmed up account would reply. They would kick/ban and another account on another IP would reply ... and so on. So there are multiple use cases for warming up accounts. Sometimes I could get another operator to kick/ban the power tripping operator and sometimes it was just entertainment. Eventually they would realize that 65+% of their audience they were power tripping in front of was just me and they would never know if they kicked all of "me".