For sure this case sucks and it should be (Captain said something in this chain that they will have new SOW process which prevent you all transactions once it's triggered, which sounds much more fair)... UKGC should really support more casinos in these regulations, instead of just throwing new ruling in place without proper instructions how to proceed with these and that casinos could have all same process in place (i remember when KYC process came and it was bit similar shite but this is ofc bit more sensitive area of personal information.
Fully understand OP and other affected fellow members frustration, but also that when you read these UKGC news, like that WHG,
LeoVegas etc... they are much better in giving sanctions than cooperate with operators about how to do these in practice, therefore understand that no operator don't want even 500k fine for failing SOW/RG checks. If you have private business and state that it's not their business to know where you earn your money, it's pretty wrong view based on UKGC penalty policy, that is exactly what they need to know, how otherwise they could guess if there is something dodgy or gambling addictions behind of player.
Also, it's not only AML but RG as well, as you have seen UKGC penalties, many of them have social responsibility as one failure, so if somebody start to deposit and play with level which is alarming and triggering some limit (guess different operators have different once as no clear ruling from UKGC which would help operators a lot), they also need to know that you can afford it, in that WHG example was 2(?) players who were let to deposit large amounts where incomes didn't cover even near, so it's not fully true that SOW will be requested only for AML purposes and can't be used for RG purposes, but operator taking care of their social responsibilities.
You could see from Captains post that operator is not still fully aware about whole process and they are looking to put proper process in place, Captain usually explain things quite clear and honestly (like now admitted that he really don't know that part between affiliate TCs and SOW), i can imagine that most of operators are struggling with these rulings atm and GIG as not really small operator might have bit bigger resources to compete with these than some smaller ones. Pretty sure that everybody will see their money, or if not, there is really strong evidence about ML, they are just left in dark by UKGC who demand a lot and give very little assist but afterwards when you can read another story about hugely fined operator. This is just something we can't get away and for sure will be implemented by MGA as well at some point.