Ring Fit does seem like the type of game that people would buy a console for. It's weird to see a game with such low cumulative sales do this well each week. Selling ~40k of it's ~622k total in its roughly 15th week on the market.
40k / 622k => about 6.5% of its overall sales in W4, 2020
1 / 15 => a single week is roughly 6.66~% of its life.
In other words, the sales it achieved in its 15th (-ish) week are above it's average weekly sales value, which I would think is quite a rare thing. Any other games that this holds true for?
Edit: Don't mean to say that 622k is a low sales number; only that it seems low to me relative to how its currently trending.