That’s how growth works on social media, it comes in waves. We are basically in the first wave, because there were only a few thousand people here before June. Its going to take a while before we build up enough organic momentum to cause a second wave, unless reddit makes another oopsie; they could trigger another wave at any moment.
The curve is fine, what you’re seeing is the bleeding of alternate accounts. Many of us made 2 or more accounts on different instances early on, and many of those initial alts are now becoming inactive as people settle on their preferred servers. The rate of active user growth is slower than the rate of attrition right now, but that’s only because the rate of attrition is so high. That should stabilize in the coming weeks.
Look at threads, their activity declined like 70% after a week or two. Lemmy is actually retaining users at a much higher percentage than the average social media site, it’s just that we haven’t gotten enough people to give it a try yet.