Anybody knows what's up with those robot spam accounts? Do they actually manage to attract people to whatever they offer? I suppose they get some but is it worth the trouble? I'd think more people would be turned off by the spamming. And talking of robots, excluding those obvious ones with the similar names, how does some site know how many robots are online? I see it on their statistics sometimes. Is it based on what they scan for and/or the scan speed (e.g. spiders), or something else?