Hello Social Coin Wallet,

well, I see your Point. But you'll have to understand all the users, too.
The username is thelinuxist, Country is Germany. As already said, I can't remember doing any brute force or guessing. I have changing IP's however, the Internet Connection I use is a private customer one with dynamic IP and forced disconnect (As in, IP is changed every 24 hours by policy of my ISP).
This put aside, my offer of my Services also applies to you. If you need another ten fingers on a keyboard, mine are readily available.
As said before, it may be an encoding problem. Was just the first thing coming up in my mind, String comparisons in PHP are (if done correctly) binary safe and, thus, bytewise - but if there is a difference in encoding, this usually isn't noticed.
Maybe the other users who are denied are also from non-english countries?
Besides, why do you bother with the traffic from blocked users (= bots) instead of telling them they're blocked and should contact support? Sounds pointless to me, it confuses legitimate users like me (and around 10 others by now in this thread) plus puts unneccessary load on your servers.

Beside all that, do you offer YouTube views from your captchas? A friend of mine is a YouTube Publisher, he might be a customer...

Regards

thelinuxist

Currently from a WindyOS System .