Ahhh, I see the problem.
What you said sounded like “membership is growing exponentially”, which is false.
What you intended was “The rate of membership growth is growing exponentially”. Which is true.
These are two very different things. If you truly meant that second one in your comment, then all I can say is you chose some very strange wording for it. And I’m not the only one that misunderstood.
Hey, that’s not bad. Thanks!