[Saris]

I'd never heard of them before getting them while using Brave search sometimes, I'm not sure I entirely understand how they work and differentiate between a bot and human.

[xelamonster]

They don't differentiate. They just make it too expensive to be worth paying for the resources required to carry out a spam attack at any meaningful scale.

[Saris]

Oh that makes sense, neat way of doing it. Basically adds a delay while also costing CPU resources.