I like the idea of attributed kudos, but the downside of showing how many you’ve given out is that some people may try to game / maximise it, i.e. give the maximum number of kudos every day, even to posts they don’t feel deserve it.
Or people may judge you for not giving enough kudos (see also the whole acceptance rate SE fiasco) or for giving too many.
Kudos may fall under the reaction system Gilles mentioned above and might be comparable to my reply to that.