I love innumeracy. Better for those of us good at math.
Confusing. The person who made the sign has poor communication skills.
My guess is it means:
Haha. Not really. A better ad would be two months free rent with ten months rent paid. I have seen sales like that. If it really is a sale and not a come on.
As a volunteer for the BLM/National monument I get this all the time. I am told my salary will be doubled or get a raise. Sometimes, I am told if I don't do a good job my salary will be docked. It's a standing joke between the director and myself.