Some observations about Mixtape's sales. tl;dr: I'm almost certain that this game is a financial flop given the amount of money spent on the licensed soundtrack alone.
Checked out Mixtape's X account. If anyone was going to brag about "number of players" vs. "units sold," then it would be Mixtape. The bulk of gamers sincerely interested in a three-hour interactive movie are probably accessing it on Game Pass rather than purchasing on Steam. Curiously, there are no tweets at all of the sort. No "number of players" or "units sold" bragging. Nothing on the Mixtape X account but retweeting reviews and praise. The numbers must be bad if they can't even brag about Game Pass player interest.
Next, I noticed retweets from Epic and Unreal Engine accounts. That prompted me to go visit Epic Game Store. As of the time I'm typing this, Mixtape is NOT above the fold. I had to scroll all the way down to "Featured Discounts" and look to the far right of the screen before finally spotting it on the front page. Not good.
Checked in on Steam's front page using a private window to avoid personal algorithm suggestions. Nothing on the front page at all. Clicked "New Releases." Had to scroll down a bit before finding Mixtape listed immediately below something called "Froggy Hates Snow." As of the time I'm typing this, Froggy has more concurrent players (403) than Mixtape (385).
Checked /r/gaming and /r/games. Mostly quiet on Mixtape discourse. Someone in /r/games tried posting that Aftermath article linked elsewhere in this thread, but I'm not sure it even made it to the subreddit's front page.
The absolute bottom line is that none of the above lines up with a true "10/10" game. No bragging about players or units sold. You have to work to find the game on the two major PC stores. Even Reddit isn't biting. "Froggy Hates Snow," whatever that is, has a higher player count. Does this sound like a financially successful game to you? Shouldn't be a 10/10 game be flying off of the digital shelves and be relentlessly spammed by the Reddit theater kids? Real world behavior is simply not lining up with those 10/10 reviews.
Conclusion: Astroturf.