Yep, that's kind of the point of upvotes or karma: You present your content and try to get people to buy it. Not sure where you get the negative sales page aspe

Yep, that's kind of the point of upvotes or karma: You present your content and try to get people to buy it. Not sure where you get the negative sales page aspect though. I made no judgement on the presentation technique or quality, just that open source or not, they are still selling something.