No their shtick is to provide data/grades on past performance. This should be self evident as that is what their subscription service is based on. NFL teams and others that subscribe to them are subscribing for the data related to past performance.
No one pays PFF directly for their predictions on future performance as most of their articles in that regard are free. Those articles are more marketing that supplements their actual core business. If you took away those articles they would still make money based on the data/grades of past performance. If you took away that data/grades on past performance they would make far less money and likely end up out of business because others like ESPN have more established brand when it comes to making predictions on future performance as they employ better opinion journalists. Hence why none of PFF's writers are household names.
One of their selling points is the predictive capabilities...
from their website
"PFF grading is both descriptive and predictive, and in many cases, we’ve debunked myths about traditional stats, showing that the production grade is a better indicator of what happened on the field and what will happen going forward."
in Fact here is the PFF experts prediction on the division winners and wild card teams from last year.....
Final PFF analyst predictions for the 2020 NFL season | NFL News, Rankings and Statistics | PFF
The average fan could have done just as good a job......also if they are so scientific, why are so many of their experts disagreeing with each other
also lol at someone predicting Cousins as the league MVP