X (formerly Twitter) is introducing supposedly unblockable ads. They have also implemented a "feature" where you cannot report these ads.

Interestingly, X does not reveal the sources behind these ads. According to Mashable, the content being promoted in these ads resembles spam and low-quality "chumbox" advertising. These are usually clickbait ads found at the bottom of posts on content farm sites, as popularized by native ad networks like Taboola.

It seems that X is resorting to these measures because they are unable to secure premium advertisers.

https://mashable.com/article/twitter-x-new-clickbait-ad-format
X rolls out new ad format that can't be reported, blocked

The new ads also don't disclose who the advertiser is or that they are even ads.

Mashable
@atomicpoet real “your eyeballs belong to us” energy in this twitter move
@atomicpoet
He's really committing to the 4chan model eh.
@atomicpoet Tell me they suddenly jump up right over where you often click. That kind of feature would really increase revenue.

@atomicpoet
@lashman

Bahaha it's turning into a shiddy free mobile app. Next will be the full screen unskippable video ads to engage with posts.

@atomicpoet Twitter is finally starting to admit that their fucking useless subscription service isn't working. For their free speech grift, they'll keep pretending cause' their users only need to call queer and nonwhite people violent slurs.