But with the current demand in software you don't really have to say yes to working 140 hours, much less without being paid for it.

At least that's what I've been doing here in Spain for the last 8 years.

The moment I'm asked to work longer hours than I want to I just say no and start looking for another job. It's quite easy to find another one and eventually you find a place where you are not demanded to do such a thing.