There are two groups of books.
There are the English/European/Australian books and there are the Caribbean books.
The English/European books have been around for years (50+ in some cases). Most of their business comes from shops they have where you can walk in and place a bet or from machines they have at many bars.
They have been legal all over the world for years.
The public companies are run by business executives - not bookies.
If you were these people and a great deal of your business was soccer and not US based, you too would pull out of the US rather than be fugitives. Many of these execs have a lot of business interests that require they be able to come to the US.
Now the Caribbean books all opened with the invent of the internet and targetted the US where booking has been illegal forever. Every one of these bookies knew the day they opened shop they were becoming US fugitives (If they did not know they knew as soon as JC went to jail) This group has not cared about the US laws for 10 years. They are bookies. They do not have a business that is legit in Europe or elsewhere. They explicitly set up to target the US. This group is not going anywhere.
We'll lose a few European outs - no big deal. If you care, get a new address.
When Pinny, Olympic, or WSEX folds, then I will say things changed.
Sean