It's such an insane amount of waste that there are rooms filled with cell phones just to churn out spam. The same job should be doable by a single server. I imagine that it's only required because platforms are fingerprinting the phones to check for spammers but obviously those systems have gone from being simply useless to becoming harmful since it's now generating massive amounts of e-waste.

This seems like something that should be regulated. The cell phone companies can identify these customers/devices easily enough.

You can get cheap Android phones for like $15, and they each get a difficult to ban cellular IP. You also need to buy the server box to make it all work, they're about $300 on Amazon and cheaper elsewhere. So you can get 20 devices going for $600. All in all, I think it would pay for itself pretty quickly.