The rapid Lemmy growth as a whole is certainly bot driven but lemmy.world addressed the bot issue already so the majority of new accounts are most likely organic.

There’s an awful amount of engagement for it to all be bots. Unless I too am a bot?

I see why you would think that but server admin @ruud was quick to notice and actually closed signup for a short period while this was happening. And then after captcha was enabled the influx of bot users was halted.

ruud is on it, no bots here. relax and enjoy the ride. :)