Betting without losing your money/no need for deposit
A little strange and something that cannot possibly happen, I have never encountered things like what you mention here, in the end the deposit is the main requirement that is required, what is offered by the bitcoin guide.org website, at first glance I didn't find anything like what you mentioned, apart from a few gambling sites that I saw here.
The statement must be referring to the one with faucet site but there is also an option to bet on the faucet site like freebitco.in which is also listed in his website.
Actually it is possible but will be just few satoshi to use for betting unless we want to waste our time to claim faucet everyday and collect it until a good amount to start betting LOL.
The statement as mentioned in the title is just a marketing words to attract people to visit the site.
As marketing purpose, it is a smart move but I think people will not be interested after visiting the website for the first time.