This is most likely to be a side line for them, maybe some spare change has been thrown at it and if it doesn't work out to their liking they could sell what they have built (if anything) and turn their attention to other businesses. It could work for them whether you like it or not and I certainly can't see why anyone should be insulted by it.
A sideline with a 'national advertising budget'?
They come across as the type of customer 99% of window cleaners wouldn't want as a customer..
Cheap? No thanks.
Have to clean at a certain day and time? No thanks.
They are only going to attract that type of customer, the ones the majority of us dumped ages ago.
I certainly wouldn't be able to build a profitable business under those terms so not quite sure how they would.
They would be better off using that 'national marketing budget' to employ some window cleaners and grow a local business.
The 3 reasons for using them are pathetic, smack of desperation and show they do not know the industry at all.