Good examples for open source contribution management

Because of the bad examples of handling of contributions to open source projects lately on HN[1][2] I show you a positive example I experienced the past eleven days[3] which motivates me to go on with contributing:

"I like the direction of this PR [...]"

"These changes are a nice improvement. [...]"

"r+, thanks!"

"That's an interesting question."

Big thanks jdm and the servo project for being so responsive to issues and PRs. I guess using the same communication and code sharing mechanisms (wiki, open bug tracker, pull requests and code review) for internal work AND for external contributions eases the observation and integration of contributions.

[1] How to discourage open source contributions https://news.ycombinator.com/item?id=8712349

[2] The reason people burn out on open source https://news.ycombinator.com/item?id=8712035

[3] https://github.com/servo/servo