Their success rate is actually lower than that, you're being to kind. They're not setup to do any real volume like decaptcher.com.
They have a new notice on their site about an influx of new customers which has caused them to overload drom 12pm to around 6pm.
I was told awhile back by their admin when I contacted them about some issues not to send traffic during their overloaded times......I almost pissed myself laughing....wtf......I'm gonna put my shit on hold for them, fuckem, why wouldn't I just stay with decaptcher.com,
Not to mention the fact they go down for maintanence at the stupidest times. Like right now, it's prime time and the fuckers are down for maintanence.
Glad I moved my shit back to decaptcher.com.
Anyway, they seem cheaper, but in the long run, with all their issues and bullshit, decaptcher.com is actually cheaper and their admin is ok too. Deathbycaptcha's admin responds sometimes. But they don't actually do anything, they just say sorry a lot.