These aren't Billboard or HITS projections, though. They're industry source projections, which can't really be based on any retail information considering it couldn't have been out for more than 6 hours of retail time by the time the author wrote this article.
The only real thing I've seen anyone say is HITS saying it would be the biggest debut of the year.
Taylor Swift will release an album this year so she'll surpass him
Let's capture the moment
Cause even forever ain't forever
I swear by the moment
Cause together ain't promised forever
Let's live in the moment
As long as we got each other
I'm prepared to die in the moment
Artists who sell 1M+ in a week usually sells ~500k in one day.
I meant that it would be more likely for a person to sell 200-300k a day to make a 1 million debut at the end of the week. If you were an artist selling 500k a week then lawd jesus you're opening would be 2-3 million.