Okay, the player rate dropped today even though there were more steam accounts online. I don't understand how Steam players work. Still standing by the two million this weekend.

Hard to tell. In raw sales numbers, OW wins easily (I think even if you exclude consoles, OW is still above PUBG), but PUBG's growth and active players are unprecedented.

Well PuB seems to be what those gamers wanted out of a BR game, meanwhile I'm expecting the next iteration of Assassins Creed to both run and sell poorly on PC, mainly because Ubisoft doesn't give a damn and they've burnt many bridges over the years. They can be fickle at times, there is sometimes loyalty within some groups on PC, but it's often true that if you burn them a few times, they will most definitely hold disdain for you for years if not indefinitely. 

I think PuB has done quite well for itself so far, though it's likely to taper off at some point, it will still have sold better than most other games on the platform this year. I don't expect Destiny 2 to rival and outsell PuB on PC, mostly because it's been delayed, it's awfully generic for an MMO FPS and it's locked to Battlenet.

Just a heads up, doing this for enjoyment, PUBG has just re-broken the all-time concurrent players of 1,523,179 set on September 24, 2017.

https://www.pcgamesn.com/playerunknowns-battlegrounds/battlegrounds-sales-numbers

I believe that the Steam Concurrent User Record has also been broken, but I could be mistaken. Last record was 15,494,146 users on simultaneously. Funnily (and oddly) enough PUBG has dropped roughly 400,000 at the same time this record was broke (The peak of Steam and PUBG do not match up)

Edit: PUBG is the only game not to be remotely close to its peak player count as steam peaks. This is odd.

Edit 2: Call of Duty: WWII - PC Open Beta is the only other game in the top 10 to experience this high of a drop off.

1,669,015 appears to be the peak for the weekend. New record. It was held down this weekend due to server issues and a lot of players were experiencing lag issues with hit shots not registering. I would expect 1.8 to 1.9 peak for next weekend.

2 million in 3 weeks

So, did it happen?

The game's servers have been very inconsistent recently. 

Does the PUBG decline start soon? With other games now entering the Battle Royal arena, PUBG inserting 3rd party ads in China, and coming to consoles?