Sources: X has had preliminary talks with Amazon to make ads available via Amazon's ad-buying software, and PubMatic, as it seeks to attract smaller advertisers (Wall Street Journal)

Wall Street Journal:

Sources: X has had preliminary talks with Amazon to make ads available via Amazon’s ad-buying software, and PubMatic, as it seeks to attract smaller advertisers  —  Social-media platform has had preliminary talks with Amazon to sell ads through e-commerce giant’s ad-buying software