First of all, I have to say I love Construct 2. It is very nice tool to create a game without coding knowledge. What I hate is lack of tutorials on some very important tools. The most important of them being IAPs - in app purchases.
As we all know, IAPs are currently the most popular way of monetizing mobile game. However, there is no way to find out how to implement this feature into Construct 2 game. All there is is this very lousy tutorial, which doesn't help you at all.
If you check the "How do I...?" forum, there are tens of questions about IAP without any replies. To be able to really implement IAPs with Construct 2, one have to do a several hours google search, visit 3rd party websites and their tutorials, and just spent hours to find out whether IAPs are possible to implement. And even after that research, there is no light at the end of the tunnel.
You are claiming Construct 2 supports all platforms like android, ios, windows, etc but you are TOTALLY AVOIDING SUPPORT of such important thing as IAPs.
Please, SCIRRA, create STEP BY STEP TUTORIALS FOR IMPLEMENTING IAPs, SEPARATE TUTORIAL FOR EACH PLATFORM, together with sample capx files, so that every developer/game creator can use it.
We need to know what kind of plugins to use, how to publish the game and what steps we need to take on each of the platform stores.
I think this is the weakest point of your product and support, and I ask you as a customer who paid for the premium version, to fix it ASAP.