Just to clarify. I'm not shutting down Lenguajero. It will keep on running (at least I'll still use it to practice my Spanish :)), and maybe we'll come up with an idea on how to monetize.
One of the challenges we faced in monetizing the site was monetizing our international members. A really big chunk of our users are from Central and South America. When it comes to advertising we don't make any money off these users (say $0.05 per click versus ~$1.00 for someone in America). The majority of these users also don't have credit cards or paypal so getting them to pay for a premium version of the site would be difficult.
One of the challenges we faced in monetizing the site was monetizing our international members. A really big chunk of our users are from Central and South America. When it comes to advertising we don't make any money off these users (say $0.05 per click versus ~$1.00 for someone in America). The majority of these users also don't have credit cards or paypal so getting them to pay for a premium version of the site would be difficult.