Why are we having opinions about how other people spend their time and money? People have been contributing to open source projects without any compensation for a lot longer than any of these on-line "tip" services have existed.
edit: Five minutes on Tip4Commit reveals:
Meaningful, feature-enhancing and bug-fixing commits to the linux kernel are earning ~$0.02 each
* 0.00002458 ɃTC https://github.com/torvalds/linux/commit/3405d230b374b692387...
* 0.00002559 ɃTC https://github.com/torvalds/linux/commit/fb5bb60cd004a00c1d1...
Meanwhile, storing a google drive mirror inside of a git repo and committing things that shouldn't even be in source control is generating $10+ per commit
* 0.01648708 BTC https://github.com/super3/Peercoin.net/commit/3921ceaa64ce39...
* 0.01632221 BTC https://github.com/super3/Peercoin.net/commit/574d0f43389ee0...
Maybe Tip4Commit is just not a well designed system for allocating reward and value? As a developer working on something you care about, this kind of comparison could potentially be a turn-off from participating in the tip community.