Question about Money Back Guarantees

So I was checking out the competition in a few niches, and I noticed some which are pushing ebook sales offer a 30-60 day satisfaction/money back guarantee. How can they do this if they are selling fake/mediocre content? Do they figure that people will be too lazy to try and get their money back or is the guarantee fake and they don't have to honor it?

For example, guy trying to sell an ebook on how to get your ex girlfriend back, says something like "if you don't benefit from/aren't successful with my methods then you can get a full refund within 30 days".

This is just a hypothetical, but there is obviously no "method" to 100% get your ex back when 90% of it is based on your specific situation.

Short questions:

Are the moneyback/satisfaction guarantees I see on squeeze/landing pages real? And are the site owners binded by law etc. to honor this guarantee?

Can't anyone just buy the ebook, download it and then "lie" saying they weren't at all satisfied in order to get their money back and the ebook for free?

Yes it is REAL. If your product is crap of course many, if not, all will refund. So ask yourself, is your product a crap or does it solve people problem? Of course, one must also know that there will be always people looking for free stuffs, they are cheapo. I refund only when I think the product does not meet my expectation, other wise, I will just keep them if they were low price.

It's a numbers game. The better your stuff, the less refunds. It also depends of niche, price, etc.