Romney is under pressure by the GOPe just like all the other politicians who have suddenly endorese Rubot.
What the GOPe is trying to do is convince Trump supporters that supporting Trump is futile. They are trying to convince us that they will do anything from changing the rules and brokering the convention to forming their own third party. They want us to go ahead and vote for their candidate, because we think any thing else isn’t going to happen.
Romney might actually be hoping for a brokered convention and to be drafted at it. But it’s not going to happen. Trump is going to go to the convention with enough support that there is really nothing the GOPe can do.
Yes to your comments, but I believe the only thing that would induce Romney to do this is the promise that he is going to be anointed at the convention. He does not need money and I doubt they have something on him that would do this.