Thanks for all the lists and references, everyone! :) +1 on block-by-default combined with "skips" for the VERY rare exceptions. I'm scoring (poison pill level), not gateway blocking (more about that in a later post).
*** New Snow TLD sighting: Since June 30, the TLD ".stream" has been snowballing, and now (in my data) is occuring at a greater volume than ".top". As of July 7, it's present in more than half of _ALL_ my snowshoe spam. While researching it, I found this handy "Cheapest Domain Prices" site: https://www.domcomp.com/tld/stream https://www.domcomp.com/tld/top The ever-anti-reliable NameCheap is beating the pack at $0.88 per .stream domain (same as their price for .top), so I expect the popularity of .stream to continue. - "Chip"