I have had several 3 day rides over the decades.
The purpose is to try to "lock in" the production demonstrated in the 3 days.
Only on dishonest drivers? What a joke!
They will toss the ride if it doesn't turn out the way they want. Even after they only select good weather days, groom the load, set up shelves, open doors, intercept and divert on calls, customer requests and all other texts, dirrect drivers to execute bad driver releases, pull your will calls after you punch, etc. etc.
Who is being dishonest?