As recognized, captchas are not effective in keeping determined people out. Nowadays the method to put some price tag for access seems to be to use SMS verification.
However not everybody is very determined. There are for example bots that are using the comment forms to send spam. The expected payout for each posted message must be really, really low.
This could be useful for example in the comment form plugins created for various content management systems.
However not everybody is very determined. There are for example bots that are using the comment forms to send spam. The expected payout for each posted message must be really, really low.
This could be useful for example in the comment form plugins created for various content management systems.