No such thing as a free lunch Jim.
It really irks me the modern interpretation of the word FREE. What they probably are on about is that you pay them money to install and you may get it back over about ten plus years if you are lucky. I know that I grew up in the age of when something is free then you got it without having to exchange anything for it. Or not getting caught doing it.
That's the way the mop flops.
My thanks to Brian for this site.