If they've lost the second point of WE, they will email you shortly. They will continue to lose more WE if you continue to not play them.
I have had 1 person actually leave my roster due to a lack of playing time that did not involve a broken promise. It has been a number of seasons, but as I recall, he was asking for 14ish per game and was getting barely half that. Like killbatman, I have had kids that I *wanted* to have leave and that I intentionally tried to irritate to the point of leaving the team. Never worked.