Thank you for clarification. I was commenting from the standpoint I-751 should only be re-filed if one has a compelling evidence to support bonafide marriage, and geniunely wishes to remove conditions. Filing I-751 for the sake of extending presence in the US, like OP was suggesting "buying time" is borderline of immigration fraud, similar to fake asylum claims etc. Of course, I'm not an IJ and wouldn't want to be.