Unfortunately that might also be due to how Instagram shows ads, and not necessarily Anthropic's marketing push. As soon as you click on or even linger on a particular ad, Instagram notices and doubles down on sending you more ads from the same provider as well as related ads. My experience is that Instagram has 2-3 groups of ad types I receive which slowly change over the months as the effectiveness wanes over time.

The fact that you are receiving multiple kinds of ads from Anthropic does signify more of a marketing push, though.