That looks like a bug with that specific page, as after clicking around a while, the pricing page appeared for me.

Starter - Free Pro - $24 / Editor / Month

https://www.lottielab.com/pricing

(Not affiliated)

Unsure where that assumption comes from as there’s a pricing page you can navigate to from the home page, also in the main menu, and no account is needed.

https://www.lottielab.com/pricing

Same.

I don't even think that's a dark pattern, just a stupid pattern