Hillary is out something like $7 million to her campaign. There's also another several million dollars of debt that her campaign owes to various media firms and consultants. If she doesn't pay off the debt, it will stick around and cripple her next campaign.
Basically, the world is a much better place for HRC if she can raise some serious cash. That won't happen if it looks like she's just going through the motions.
She's not going to the convention. The only real question remaining will be how negative she is between now and the time she leaves. If she can stay positive, no one will force her out. On the other hand ,If she starts taking cheap shots look out..