(01-13-2011 07:50 PM)Banalyst Wrote:  You do not know how this (btw legitimate and big) business works. Human solvers do not directly interact with web resources being cracked (in order to be legitimate, cheap and automatizable).  
KeyCAPTCHA can't be re-transmitted to 3d parties.

I fail to see how it cannot be transferred to third parties.  Just because you don't know how doesn't mean it's not possible.

(01-13-2011 07:50 PM)Banalyst Wrote:  "In fact, it [reCAPTCHA] became pretty useless on 4 January [2011] when spammers apparently got their collective hands on a piece of software that circumvents reCAPTCHA and allows for a fully automated registration process. The bots have been busy, very busy indeed, ever since"

Read more:
vBulletin forums hit by reCAPTCHA cracking spam bot | PC Pro blog http://www.pcpro.co.uk/blogs/2011/01/12/...http://www.pcpro.co.uk/blogs/2011/01/12/vbulletin-forums-hit-by-recaptcha-cracking-spam-bot/?DCMP=NLC-Newsletters#ixz

How about we quote some other parts of the article?

Quote:Google officially remains adamant that there is no problem with the reCAPTCHA system, which it operates. A Google spokesperson told PC Pro that it has “found reCAPTCHA to be far more resilient than other options while also striking a good balance with human usability”.

In other words, Google claims that it isn't a problem with the captcha system.  Considering the article only considers vBulletin forums and not the numerous other websites which use reCAPTCHA, one may think it just to be the vBulletin implementation which has flaws.

More support:

Quote:A Google source who did not wish to be quoted directly confirmed that the company had recently noted a higher amount of spam getting through on some forums, but insisted there was no evidence to suggest it was automated or impacting on larger sites.

And

Quote:Yet that same Google source insists the company modifies algorithms “rapidly to respond to new types of automated attacks” and any type of spam increase will not remain for long if it’s bot-produced.

Sounds very much like the claims that you're making with your system there...