>I can't remember the details of the MOL/Exxon agreement

That's because they were never published :)

We do know that from MOL's "Unconventional Presentation", that they have a STOP/GO point that is at the same time as Falcons. (page 6)

They also said this back in 2007:

It's very important both for Exxon and MOL there are very clear exit points at the key stages of the operation. I.e., that the risks, of course, and mitigation of the risks can happen in different stages, depending on the maturity of the program.

http://www.molgroup.hu/repository/410158.pdf

Notice though how the timelines on page 5 and 6 are conflicting. Page 5 shows that it will take up to 6 years to prove economic viability!