Holy cow! You are correct!
I just took a look and saw an entry for the bgreatconsulting.com spam.
Though I'd like to know if that was an effect AFTER the filter bypass failure.
Because I know I NEVER put ANY entry in subscriptions, yet there are some for valid companies.
And for anyone else thinking of doing it, do NOT click on unsubscribe for the spam stuff.
You'll likely open up a whole can of worms by doing so, depending on how Microsoft implements the "unsubscribe" and how the spammer implemented it as well.