The biggest streamer is actually YouTube.
And YouTube got that big because of... algorithm.
Same with TikTok.
So, you bet the streaming data from D+ and Hulu are being datamined.
Plus, third party companies monitor all the data they can get from they're poling and participants (think Nielsen). And this gets sold to all the streamers so they know what their competitors are doing.
Of course, datamining isn't going to accurately forecast how a new piece of content is going to do.
A Zach Snyder version of Star Wars? YES!!! WE ALL WANT THAT!!
Oops...