The problem with spam isnt the content, its the quantity.
Lots of spam emails are for genuine services. But its generally accepted that because the speech is unwanted and the quanity of it lowers the quality of the platform, that its fine to filter it off.
Free Speech absolutism should incorporate it, but doesnt. (Which sort of indicates its mostly about broadcasting their opinions rather than being in favour of all speech)
They are welcome to change their moniker to "Free Speech Marginalist" otherwise, if they continue to advertise as absolutist I will continue to insist they live up to it.
Spam is far too obviously not speech is the thing. They will continue to use the moniker "Free Speech absolutist", and ignore you. But keep campaigning as the one lone voice with that, I'll still continue cheering you on while the rest of the world ignores your funny viewpoint that isn't believable for you to actually even have.
I'm a 3/4 black partially Jewish gay man, so you can imagine where I stand on "Free Speech absolutism". While I am for the most part on your "side", I want to stick to arguments that are persuasive.