That isn't cumulative metrics; it's just heavily heavily smoothed.
Oh, my mistake, thanks!
I made the same mistake; they're both roughly exponential, and the maximum value is different by pretty much exactly one factor of ten.
I was mislead by the chart too, i had assumed it was a chart of daily queries (getting a daily average to smoothen it out makes sense to an extent, but a 365 day average when you have this many data points?), however one redeeming quality is they let you change the day average from 365 to say 5 days. Despite that, they still grew by 25% in 2021 (which is much less than their growth in 2020 of ~60%, but still not at the level of stagnation)
I'd prefer if the chart at the top were daily/monthly queries. Then you'd quickly see their huge growth, but relative stagnation in 2021.