Developer Dalton Caldwell has called out Facebook in a very public Dear Mark Zuckerberg post for, allegedly, bullying tactics in trying to acquire him and his app, rather than allow it to compete against upcoming Facebook functionality.

Elsewhere, Twitter is under fire for reining back the features open to third party developers in a bid to better control (and better monetize) user's experience, an issue analysed here by Mike Isaac on AllThingsD.com.

It is nothing new for platform / OS vendors product managers to look at an individual developer's bright shiny big ideas and simply see another potential feature enhancement for the list, rather than a new category. Nor for platform vendors to manoeuvre the direction of their platform in their own self-interest (why wouldn't they?).

What we are seeing here is some of these newer platform / developer ecosystems fall out of their honeymoon period with their dev communities. Now they are entering a phase of maturity, the more established OS vendors have been living through for many years. As these platforms become more corporate and more controlling, some of the innocence, openness - and opportunity - that attracted developers to them will be lost and doubtless replaced with a more managed engagement. That's not completely a bad thing.

The Facebooks and Twitters of this world are very capable of making this transition. More interesting is whether the latest wave of developer ecosystems created by organizations in media, publishing, financial services and retail, are alert to what these experiences tell them about the evolution of their developer community programs.