I mean it’s possible, but lemmy only has ~50k monthly active users. Reddit, on the other hand, is in the millions (>400M monthly active users last year, and >50M daily active users). Lemmy just isn’t anywhere in the ballpark of being a threat to anyone.
I also think Lemmy has some architectural issues that will make it very difficult to scale to anywhere near Reddit size, even if it somehow gets the users.
It’s a cool service, I just highly doubt it’s the target of any big campaign. And that’s a big part of why I’m here, it’s big enough to have interesting communities, but small enough to avoid most of the spam.