I was quite lucky with these so far. A wavering sim once got it, but even with the monetary incentive couldn't decide to commit (they got married much later, but I looked how much it would have been and split the money between the rest of the family, because it would have to go somewhere). Then another time one of my most greedy sims got the call the night after her first date with a high ranking business career sim, needless to say he wanted that money, too. They planned to divorce quickly, but then fell in love for real. And if I don't want to take the story hook at all I can always just collect the risk free play money.
Only downside is it doesn't work for sims with the Carefree reward trait, because that one will negate the Tense moodlet timer.