The guys from infosyssec.com don’t allow anyone to get into their  website unless they get permission
after emailing them.
This is some original way to prevent bot spam and yet I wonder -
how many humans take the time to send Infosyssec an email, requesting an access to their website?
My guess is that very few, if any at all…
Today online users want to get everything right away.

Dear Infosyssec, why not using captcha or any other spam prevention applications, instead of giving your potential clients a hard time???