I’m a Moderator on another Forum (Electronics/amp building) and we get spammed to Death .... Every day is a long list of spammers banned, a continuous struggle to keep up with them ....and apparently , as Greg said, they are very sophisticated , and able to get past all our devices ...
Something we’ve speculated on is the individual spammers appear to work through a much larger system (Evil conspiracy ?) , technically much beyond their capabilities ...
Since we never see any spam here , you guys are doing a Great job !!!