carrier problem sounds like something to do with pigeons ...
My theory on why this site has been targeted for spam although it's a small site

Well, you know that the site has ten million accounts, but only a small fraction of them, maybe even less than 500, use the forums here. This is still after all a chess playing site, not a chat site.
500 is probably close to the number of people who are fairly active on the forums. But there should be a far greater number of people who visit the forums every once in a while, or who have been to the forums at least once. At the rate at which the ads are appearing right now, it isn't unlikely for someone to see one of the ads the first time they visit the forums.

I asked the Black Magic Vashikaran guy if with his magic and/or potions he can make a monstrous penis smaller. So far no comment.
I also advised him to add more chillies to his curry. No comment.
I asked him also which asylum he escaped from. Once again, no comment.
He is a shy to respond, but not shy to post his bullshit. Good thing he seems to be on auto-delete by management.

I see the "Black Magic Specialist" is hitting IMDb.com right now.
I go there to look up some info on The Sound of Music (1965) and every other post is "
Black Magic Specialist Baba +91-991470...
Yikes.

Here's my theory, and I think it's pretty valid.
One or more ex-members of this site have an axe to grind. A grudge against either the moderators or the owners. They have decided to spam the hell out of this site as retribution for them getting banned.
Perhaps these ex players held their username in high regard, maybe actually thought they were a legend around here, and then they get their account closed by chess.com staff for reasons they feel unjustified.
Spamming the forums is their form of getting even.
Looks like cheater_1 is back!
Yes, yes all valid alternative theories indeed.
The fact that the "advertising" is for freakin' ridiculous "services" like black magic, voodoo impotence cures, and mail order marijuana may hint at this being more of an elaborate prank.
The passports/counterfeit money spam is relatively normal in comparison.