Just read a good piece by Alex Taub on The Most Important Part Of A Product Integration Deal. The key takeaway that every person in business development should remember is:
If you are trying to get your service/product integrated into somebody else's product, then I 100% agree with Alex's view which is if you cannot get the proper placement, you should walk away from the deal. These things always end badly if you don't get it right. The results will be bad, the partnership won't last very long, both sides are unhappy, typically the consumer experience will also suck - all bad things and a waste of precious time and resources.
This advice also works for people who are on the receiving end. If you are going to integrate a 3rd party into your solution/service, you should also make sure that placement is perfect. I know the pressure is often to do a deal and give somebody an integration and call it quits. It is also easy to give your own internal features a preference or better placement. That's not good enough. If you are going to have somebody integrate into your product, you should focus on the consumer experience above everything else. First, make sure the product is valuable to your users, that the experience is fluid and simple and that they can find it. That's good for everybody involved.