Rubio doesn’t have a snowballs chance in hell of becoming Trump’s VP even though it may not be a bad idea. Looks like JK is looking for the VP slot with Trump. We should know in a few weeks.
Rubio remaining in the race is a signal that he has a deal someplace. Losing badly in his home state kills his career in the estimation of many. Getting out makes sense. Staying in means that he has promises elsewhere for something else.