Depends on the use case. If the captcha is to prevent overuse of a free trial, then nobody will operate a lot of devices just to get more free trials if the pa

Depends on the use case. If the captcha is to prevent overuse of a free trial, then nobody will operate a lot of devices just to get more free trials if the paid version is cheaper than those devices. If the use case is to improve democracy, then it gets more complicated.