This article was originally published in DIGIDAY.

Amazon’s ad business is now worth almost $2.2 billion according to the company’s second-quarter earnings, a year-over-year increase of 129 percent. The revenue was, as always, in the “other” line item, which is primarily sales of ad services.

In the first-quarter filing, Amazon said that ad revenue had grown 132 percent year over year to just touch $2 billion.

It’s been a period of consistent growth for the e-commerce giant. Many marketers now see Amazon as its third-biggest media partner behind Facebook and Google, especially with lower-funnel activities. Since Amazon provides a clearer understanding of what is actually being sold, the advertising product is of particular interest to marketers who want better attribution.

Google parent Alphabet, in comparison, said ad revenue was at $28.1 billion, with total revenue up 26 percent to $32.7 billion.

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