I did a couple of groupon campaigns 5 years ago, yes I worked for minimum wage, and yes I still clean for customers gained,
It has to be structured correctly,
my tips
negotiate the percentages with groupon.. yes they start at 50/50 I think I got 70 30 in my favour in the end.
DONT run the offers they suggest, make your own with as high a price as you can for least work you can, I did any 2 for 39 in the end.
Dont forget you get paid whether they call or not, this is where the quick profit is.
exclude stairs from the offer and then charge £3 per step, that brings most jobs into a decent value.
use it as a last resort, I was fresh out of a divorce with no cash for marketing, just willingness to work and some cleaning equipment and a van.