When gambling on these site's realize they are operating chances are in countries that will host gambling websites, not US and some others that they would have to comply to laws (and probley could not even get open legally).

They are free to set their OWN odds.   So .... no regulation and they set their own odds.  They might be turning it up and down you don't know.

Anyways there is no max you could lose, you could lose it all.  And the house always wins, especially when they program their own rules.