Decent post on his workflow. Asana looks nice enough but I would always prefer to use open source or pay for a product rather than using a product that is just

Decent post on his workflow. Asana looks nice enough but I would always prefer to use open source or pay for a product rather than using a product that is just free. Just doesn't make sense unless they are selling your info to advertisers. Does anyone know how/why Asana is free?