For the past month, Facebook has been enforcing its rule that developers only use advertising services provided by those companies that have agreed to abide by its ad provider terms. Meanwhile, more ad companies have been signing on to the terms — 15 of them since the beginning of March, by our count, to total 77. The list of new companies is below; the official list is here.

Google is still missing, of course. Facebook’s terms prevent ad companies from doing things like repurposing Facebook user data for their own targeting technologies. Because Google collects and uses data about users for targeting purposes, services like its AdSense ad network for web sites could be impaired if it complied with the terms.

Meanwhile, other ad providers who have long been active on the web, like Adperio, are now on the list. So are some long-time offer providers, including DoubleDing, and a mix of startups. Here are the 15 additions that we’ve tracked over the course of the month. Let us know in comments if you  have any changes or additions.

• Adap.tv
• AdJug
• Adperio
• Appatyze
• AppCastNet
• DogTime Media
• DoubleDing
• Improve Digital
• maudau
• mobAVE
• Open Inventory media
• Paymentwall
• Publicidad
• smartclip
• Techcrea Solutions – FirstHeberg

Note that while the above companies have agreed to the terms, Facebook also says it holds developers responsible for what ad providers do within their applications. For more details, see our chronological coverage of the list since it emerged last December.