You either believe in the currency and wish to implement it into your platform, or you don't.
Have they not already taken the time and effort to implement it by placing coinbase buy buttons on their website?
Am I understanding this correctly? If app.net does not receive some arbitrary amount of purchases made in Bitcoin before some arbitrary date, that they will disable Bitcoin as a payment option out of spite?
I certainly wouldn't spend any of my Bitcoin on such a hostile company.