Does Lichess have secret bots?

Does Lichess have secret bots? I've faced non-BOT opponents (e.g. Ahmad_halabi) who have about 40,000 bullet games, and their rating rises and falls consistently over time (they never take a break from playing), and they only play bullet. This seems like bot behavior to me, unless some human is super consistent and really into chess.

We have people with way more games than this.
And no, there are no secret Lichess bots.

German11 played more than 390000 bullet games, *respect* but he has a lower bullet rating than mine

matteoferdinando63 plays non stop ultrabullet