Have you considered letting people also report refresher equity grants? It would be interesting to see how they vary at different companies.
Another thing I’ve noticed on other tech career forums, is that a lot of people seem to report their equity based on the value it had once it vested rather than the value at the time of the initial grant, which obviously can inflate the numbers since the same growth isn’t guaranteed going forward. Any sense if this happens much with levels.fyi data?