I wish there was a website that had like three major aggregators instead of just the one. The issue I come across is these sites all have something missing. For the fediverse observer, they sometimes do retro activity that doesn't pop up until you look at the graph again.
What I can tell you anecdotally is i am seeing a lot more engagement with content faces are sticking around last couple of months. So I pulled the numbers from the aggregator that I know at least lets you audit the numbers. But its still not perfect.
