No it points Greenwood, Cunningham, Kemp, Evans, and some others as having hit a million+ novels (and even a novel hitting 10,000 to 100,000 is very profitable if published internally).
I get what you're trying to say here, but . . .
So what? So what if they have historically sold tens of millions of copies? So what if 30 years ago Drizzt was super popular and sold millions of copies? So what if Ed Greenwood's novels have sold millions of copies across . . . how many years exactly? Because I'm certain that it is more years that Critical Role has existed, which is the main point.
Critical Role is popular
now. Exandria is a huge deal
now. Nostalgia for the first few Drizzt and Forgotten Realms books is not a huge factor anymore. Just look at the new Dark Alliance game. How many people are still playing Drizzt clones? How many people still care about Elminster or Laeral Silverhand versus the characters of the Critical Role campaigns? How much money have Drizzt and Elminster made in recent years compared to how much Critical Role has made from Twitch alone in the past 2-3 years? How well are the FR adventures and SCAG selling compared to Explorer's Guide to Wildemount and the upcoming Critical Role Adventure book? I fully expect Call of the Netherdeep to be the single best selling D&D 5e adventure in about a year's time. Critical Role is that big of a deal.
So what if the D&D movie is taking place in the Forgotten Realms? That was expected, the FR is the base campaign setting of D&D 5e. It's been around forever. Just because it's getting a movie doesn't mean that it's still as popular as you say it is. Dragonlance used to be super popular, but it isn't getting a movie (probably because it's not really that popular anymore). Popularity gradually fades. Critical Role and Exandria are popular here and now, and I fully expect it to surpass the popularity of the Forgotten Realms in the near future, if it hasn't already.
Critical Role is a huge deal. It's probably the most important reason why 5e is as popular as it is now. It wasn't the Forgotten Realms that boosted 5e to its current unprecedented levels of popularity and presence in the mainstream.
If Exandria isn't already the most popular D&D setting to date, it will be soon, and I fully believe that WotC has realized this. This is the third official D&D 5e book that Matt Mercer has worked on (Dragon Heist, Wildemount, and now this), and I don't expect WotC to let go of this cash cow anytime soon. They know how big of a deal Critical Role and Exandria are. This is the first D&D 5e adventure book that doesn't take place in the Forgotten Realms (ignoring the Witchlight, because it's still heavily tied to FR lore), and it's no coincidence that it is.