Maybe don't throw away the current integrations that work for magical new platform, but instead work collaboratively so that both parties plan and work together on channels to manage change from a position of trust? devops for vendor relationships. Instead, seeming to take an adversarial tone isn't going to benefit either service. I would consider rolling back the developer TOS to something equitable and sign mutual NDAs to share support / source for channel integration code and make publishing stable APIs in both directions a priority. Otherwise, channels will disengage as we're seeing right now and it hurts the platform because it gives the appearance of shifting externalities to everyone else, even if that is not the intention. It comes across as bullsh!t.