Why are big boobs enough to get a lot of followers on social media?

This is an example page of a model that does a lot of travelling, and showcases this on her page. She has 145k followers. She has big boobs. Yet look at any other average girl and they have no where near that amount.

And then you go on the IG main feed and it's usually huge boob, huge butt women lol. It's like that's all she needs
Why are big boobs enough to get a lot of followers on social media?
Why are big boobs enough to get a lot of followers on social media?
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