It could be that February is the shortest month, while January has 31 days. That’s two extra days. My napkin math says that’s roughly the expected drop for ha

It could be that February is the shortest month, while January has 31 days. That’s two extra days. My napkin math says that’s roughly the expected drop for having two fewer days in a month. 88*(28/31) is roughly 79.5. A little over 90% of users as the previous month, with around 90% of the days. That’s lazily assuming all days are created equal. It isn’t a simple 10% drop.