Comment by Bender

Only way to stop is to start fining these companies.

There is a way to fine them regardless of where they are operating from. Get them on the DNSBL/RBL sites such as uceprotect, spamcop, spamhaus, etc... There are many others. They are still used to this day though indirectly behind the scenes instead of outright rejecting email from those listed. They affect spam scores and are also used by some commercial server products. In some cases this is still a fine regardless of regional laws because one has to pay to get removed immediately rather than waiting for the penalty period without more reports to pass. Uceprotect is well known for this. Some see them as extortion sites and I love it. Spammers should absolutely be extorted to send more UCE.