Sony G&NS Network Servies, basically PS Plus subs, had $3,27B in revenue during the previous fiscal year. During the first half of the current FY23 it had aprox. 16% increase YoY.How much are the ps+ subs worth?
We also have to consider that people who play it on PS+ also can buy the DLC that was going to be released a bit later, so probably they wanted to test if it maximized the DLC sales, and also how it does affect to the sales of a game to include it 1 year after launch.
When adding that, behind there's a comment regarding Rift Apart mentioning that after seeing that projection for HFW they were going to wait more before including it on PS+.