Why do I get spam on Twitter?

I’ve read the twitter rules and I can’t tell if they allow spam or not, it seems like they don’t. But at least once per day I get a tweet that is not from someone I follow or a retweet. This is not allowed right?

Here are the Twitter rules. Scroll down for the section on Spam and Abuse:


You can block a user and report them for spam.

As for the question of why you get spam in the first place: it’s what spammers do.

I thought tweets that don’t have a legitimate origin are ads?

Yeah, on re-reading I think the OP must be referring to promoted tweets:


There’s a Dismiss button.

So it’s spam but they came up with another name for it.

More like it’s an ad, masquerading as a tweet.