We think it was because of the economic crisis. The restaurant sector was hit pretty hard and that probably caused a lot of companies to stop advertising.

The revenue is now back to it's old levels, but it stayed that way for 6-7 months.

We started a program that allowed restaurants to advertise directly with us. Made it very easy to try by not having any contracts and being a lot cheaper than our competitors. We got someone to do sales on a commission-only basis. He was so good (~ 70% of the restaurants he calls become a customer) that he is now a partner.

We also added affiliate links to sites where you can order food online, make reservations, etc.