This liability would most likely prevent Sarah from getting a new loan (for example to move away from it all). And in theory bankruptcy means not being able to

This liability would most likely prevent Sarah from getting a new loan (for example to move away from it all). And in theory bankruptcy means not being able to fulfill existing liabilities-which Sarah is most likely not able to. But practically Meta probably wants Sarah to not publish the book. Sarah may get even more money from another deal with Meta :)