When Disqus first launched, I was a little critical because I like to maintain control of comments, give commenters the benefit of Dofollow links, and ultimately retain control of their user generated content.
I now feel that 95% of bloggers should switch to using Disqus, though I have some reservations.
These are some of the reasons why:-


CAPTCHA Adverts As Part Of Your Sales Funnel & That Patent Thing
The website real estate around forms is both highly valuable and rarely used effectively.
But when I see the tech media oohing about a 3rd Party captcha service that uses ads, I feel I can add something to the discussion.
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