Sea of Thieves has been out in the wild for a couple of days now if we consider the early opening in New Zealand, an Rare released a video to address some of the launch issues the developers are working on.

First of all, we get some numbers. According to Studio Head Craig Duncan and Executive Producer Joe Neate, the game has already seen over a million unique users in 48 hours, and there have been periods in which over 5,000 players were trying to log in per minute.

https://www.dualshockers.com/sea-thieves-one-million-unique-users-rare-addresses-launch-issues/

The game looks to be pretty successful.  Hopefully Rare can keep this momentum up with more updates. Also been having fun playing the game so I'm glad to see it doing well.

I don't know what to make of this, considering it's on gamepass and on both PC and Xbox.

This game is actually way more popular than what I was expecting. Honestly surprised it reached a million in two days. Good job rare!!

Since its a GaaS and on gamepass player base is as or more important than sales.

So I'd say close to 600,000 sales across PC and Xbox since a sizeable amount should be on games pass.

Still very good, will probably break a million first week. I really didn't expect that at all

Piracy is a serious problem.

Yeah I'm surprised this game went so viral, I guess there's big demand for pirate games haha. I'm still being very conservative about the sales, I honestly think it might even be close to 800,000 because I'm not really sure a lot of people know about games pass. 

I wouldn't be surprised if game pass isn't as big as what people think it is. I'm not really cray about downloading the whole game and then it expires when I stop paying for the subscription... But that's just me also 

We really don’t know the sales/game pass split. For all I know it could be anywhere from 200-800k users on game pass. I doubt this game breaks 1 million sales in a week unless pc Is really taking off.