A wave of spambots just hit malfunctioning.technology, took me awhile to ban them all after closing registration. I really need to upgrade all my Masto servers to the latest version and block this particular email server, but I've been trying to have a pleasant summer away from the computer instead, so I've been lazy. 😛
The annoying thing about the spam is that for the spammer it's automated whereas for the Masto admin it's a laborious point-and-click exercise. An uneven fight.