Yes. I spent last week hoping that everyone from Reddit moves to Lemmy, but I realised that I don't need Reddit to die, I just need Lemmy to be successful enough. There is a critical mass of people needed to sustain a set of useful sublemmys, but that number is a tiny fraction of Reddit.
That's the neat thing about federation. A lot of these people are coming from the million plus users of Mastodon who didn't need to make a new account to use Lemmy.
The active user count isn't up that much. It's mostly people finding out about Lemmy or remembering it exists. They're building the communities that will be there when the Reddit API changes finally go into effect. It's actually better that it happen this way so most people's first impression coming from Reddit is a good one.
