Well it’s certainly possible whoever let them walk made a business decision. If (and I am just putting numbers in here for sake of argument - you can swap in any numbers you want) the Prock family wanted $4 million per year, and the most profit they could return to JFR would be $3 million per year it would make no financial sense to keep them. Meanwhile, Tasca may be so hungry for Thomas to tune his car he is willing to fork over the $4 million per year even if he loses money. Tasca has something to prove - JFR doesn’t, and they still keep Cornwall to sponsor whatever team they put together to replace the Procks.