It's not the majority of the time, but I've see policies against 'bullying and harassment' used to silence anything but. That might be what is worrying OP.
You see, that's where you're way off base. Not everything shown here is going to be a 'product'; people often like to learn by doing, and showing what they create.
Can't speak for OP, but that's probably it. After the whole cluster that blew up around him the community seems very split in their opinion of him now.
While I agree that there is a conspiracy element to it, research has been done into this area before by Facebook. Whether or not it's in use is a whole different can of worms.
This is an excellent little project to play with if you want to learn more about the functions of the kernel. The accompanying book is a great resource and provides relatively simple projects.
Alpine really wouldn't fall into the Enterprise category due to it's small size and developer pool. It's a great community project that I wouldn't doubt has some form of corporate support financially.
This is really interesting, and I was glad to see the author go beyond just the stated 40 days and give insight into where they went after it was 'self-hosting.'
I like Tox, I've used it plenty to keep in touch with friends, the big issue that it faces is convincing people to use it rather than Skype. The privacy conscious seem to be more likely to switch over, though.