[Philpax]

Free use without registration -> free to anyone and anything -> easy to abuse at scale, with no way to restrict use.

[nicce]

You can limit it a lot to minimize the abuse. In free entrypoint, set token and context limits to be very small. Limit to 2 prompts per IP or something every X hour. That is already a substantial limit where bypassing might not provide much benefits.

[xaqfox]

Residential proxies are too prevalent for IP address limits to work effectively.

[nicce]

Is there some public research that how often, for example, people download malware that allows this?

[HarHarVeryFunny]

You can use cookies to track usage history

[TOMDM]

I can delete cookies to obscure usage history

[HarHarVeryFunny]

You can combine it with user PC fingerprinting

[dgellow]

You can also just ask for a login…