SP gives tales on that in pretty much every video. It's usually messenger apps where the coordination happens - scammers share and sell lists of leads, marks and mules, with different prices for "verified susceptible" targets, there's regional groups (even on Facebook lol) where scam ringleaders and potential agents meet, and yes there's payroll and even legit shift work.

In the worst cases, legitimate companies sublet their office space to scammers - the day shift are regular callcenter employees that do fully legitimate consulting/support/outsourcing stuff, and in the night the scammer crews roll in. Utterly absurd to watch, and police usually doesn't do shit because they're paid off.