They should notify you, but I’m sure they probably do. Some sites have newsletters they email out that you can opt out of. I think they probably don’t want to bother you every time they update their terms. I assume most of the time they’re doing it because they have to legally, not because they’re trying to target their own users.
I think most of the time, gambling sites do not notify their users.
On the other hand, I'm pretty sure that it's just a rare case where even when we are not notified of the changes in the Terms and Conditions, we are still safe in our usual doings. I also think that in most cases where sites are using the Terms of Service against their users is, if the user won an insane amount and subject to investigation first even the winnings are done fair.
No choice but to comply with what they need. If they tell us some shitty reason why they shouldn't handle the win, let's fight back by exposing their name on various gambling platforms and showing the community all the proof. But I still believe there are lots of trusted sites out there that by just following what they need and being asked, will soon hand out our withdrawals smoothly.
If there are some slight changes then for sure they wont really be making out some announcement but if it does have that significant change then it would be definitely be announced whether on-site or via email.
Most of the time it wont really be that be told about those changes yet usually changes made doesnt really give out much impact or effect into its users unless if this one changes on restricted countries
or to those compulsory KYC then it would really be something that will really be told about. If a certain casino do make out those kind of reasoning about violating some terms and conditions and you havent been able to read it up earlier then there's no way that you do have the confidence on fighting or making some reasoning just because you had just simply missed out on reading it out on the first place.
This is why it would really be that always important that you should be reading up those TOS on the time that you do play so that at least that you are really that able to be aware
if there are some changes made if ever they would be throwing up those kind of issues or violations into you.