I personally think it should be illegal to write such a long text ! They know no one has time to sit down and read pages. It can very well be made short! They use this trick to get people just sign up without any idea what they are getting into.
Also, tos can be changed without you noticing it, while it's okay when you register, but after that they simply ask or require something because they just following their terms that was just changed a while ago, I have experienced such scenario many times and I end up following what they requires or just forget the account.
this is true, they may change the content of their ToS without you noticing it. so if you are heavily invested or a high roller on a specific casino, you should always check their ToS every once in a while or at least those sections that you feel you need to abide by.
and with those wall of texts, some people are really not that keen on reading the content of ToS. but as i said, if you have significant amount to play with, reading and understanding their terms will be your saviour, if in case something goes wrong with your account.