We made the switch from paid, to ad driven, to freemium/IAP for our in-house games. Zynga was one of our biggest clients. Hasbro came in second. As well as a f

We made the switch from paid, to ad driven, to freemium/IAP for our in-house games. Zynga was one of our biggest clients. Hasbro came in second. As well as a few white label advergames (eg. Vans shoes). We rarely made more than a small cut on profits (if that) and were generally paid upfront and on delivery.