The current defending cup champion, and 7 time are both losing major sponsors at the end of the season. I'm sure both teams will find sponsorship, but will the new sponsor for the 48 car pay HMS the same money that Lowes has been spending?
Here's a recent article about contract negotiations. Truex is probably looking to make some $$$$ at this point in his career. Hard for that to happen without major sponsorship $$$$.
http://www.espn.com/jayski/cup/2018/story/_/id/24103506/truex-contract-negotiations-ongoing
I don't agree with the rule that allowed it, but he won according to the rules in place at the time. Or was that another rule that got made up as they went along?