It's also pretty ridiculous that the forum administrator would need to waste his time deleting every day bot signups when a solution exists that would make automatically not let 99% of the bots register.
- so if you want to avoid this, spend ten bucks and save your time... Are you pretentious enough being not able to spend such amount?.. ;-)
Additionally I would say, that Captcha addon will not work on every standard hosting configuration. As I see in my practice, about 10-15% of servers have not compiled Freetype library with GD(or even do not have GD), which makes running of this addon impossible. On some servers additional configuration is needed, which could be done only by experienced person. Preferring to avoid such questions, we released this addon not available to everybody. So we could give an advice or install the addon for additional little fee - I can't understand what is against "the rules" here. It just would take too much our time, and I think not answering the questions is worst than answering them for a fee.
I agree your comments are constructive, but that doesn't mean ours are not as well :-)