@Steve Beesley
I think the article makes clear the system checks if it has visited a URL within the *previous* 24 hours against its black and white lists. If so (its on the white list) it should *not* follow you.
So it depends if you started logging who was following you as soon as you heard about it, how often *you* visit you sites and (equally) importantly how often *other* TT customers visit it.
Check your logs and you might well find a regular visit to your sites. what they are actually looking at on your site is another matter.
As for how effective this whole scheme is well if a site is infected right after the last scan TT customers get a whole day (at least) to be infected before it warns them off. How many TT customers have no effective AV and would feel "secure" with this system is an excercise for someone else.