It could be bots and such, but if you take into account that probably every comment or post (I dont exactly know how the plaform works) gets a self-like, it's easy for this number to be high. The other person that replied to you, has around 110total likes just from comments/posts and it's been around less than a month.
So, if the platform has self-likes, it could be possible🤔
I dunno, over the course what, six months? A year? And since there's been an influx of Twitter users they're probably frantically liking every old follow/er they see to recreate their network.
Also, on Bluesky likes influence the algorithm more than it would on the fediverse, so who can blame them for gauging the ecosystem?