Why users should solve the problem of spam by solving capchas? [closed]

1. How does CAPTCHA prevent spam?
2. Why would spammers want to solve lots of CAPTCHAs?
3. Do you think using CAPTCHA is effective?
4. Why do we use CAPTCHA?

How does CAPTCHA prevent spam?

It uses advanced techniques, with the latest version being able to filter out suspicious visitors without the need for a manual puzzle being solved. They look through your history of entering ReCAPTCHA in the past on your IP address and offer clues that can determine whether you're a bot or not.

Why would spammers want to solve lots of CAPTCHAs?

The completed captchas help spammers open new online accounts to send junk e-mail and carry out other mischief. Executives at Internet companies like Google say they do not worry a lot about people being paid to decode captchas because they are one of several tools that Web sites use to secure themselves.

Do you think using CAPTCHA is effective?

CAPTCHAs and reCAPTCHAs determine if a user is actually a bot. While these tests can help stop malicious bot activity, they are far from foolproof.

Why do we use CAPTCHA?

CAPTCHA stands for the Completely Automated Public Turing test to tell Computers and Humans Apart. CAPTCHAs are tools you can use to differentiate between real users and automated users, such as bots. CAPTCHAs provide challenges that are difficult for computers to perform but relatively easy for humans.