1. "Facebook approached Voxer about a potential collaboration that led to Voxer sharing its patents and proprietary information with the company"
2. Facebook then said 'naaaaah'
3. Facebook then copied some of the technologies he'd shown them to both Facebook and Instagram
The conclusion most people would draw is that Facebook is a piece of shit.
Does that clarify things? Or would you like to keep suggesting that people here have double standards regarding software patents?