I use Slackware, therefore the feature is useless to me. I don't doubt it must be useful to at least some people.
I'm fairly new to this website and I didn't know about this feature! Maybe an example link would help? :-)
Some games that have packages in Ubuntu/Debian/openSuse have 1-Click-Install buttons, see Hedgewars and Frogatto for example (it will appear at top-right corner).
Anyway, we've already decided to keep that feature for now, but it's still interesting how many people use it.
Better provide info about repos... For example some Fedora RPMs are in OpenSuse Build Service repo.