The company said that since it started testing advertising on Amazon eight months ago, it has not noticed a drop in subscribers, so it does not have to fear its customers going to pirate sites instead.

Of course, an Amazon Prime account lasts for a year, so after eight months, the full impact of advertising might not be felt yet, and the amount of advertising the company plans to hit its viewers is much higher than now.  

Still, the company thinks it is time to stop worrying about customers' opinions and get more advertisers on board with the plan.

Kelly Day, vice president of Prime Video International, who oversees the streaming video business in global markets, told the Financial Times that brands will have more ad slots to target in 2025.

Talking ahead of its first London "up front" on Wednesday evening—when television companies present their plans to advertisers to attract money over the next year—Day said its advertising "load" would "ramp up a little bit more into 2025."