This was highlighted to me recently when someone in Slack noted that one person had ~50X the kudos of everyone else and asked how that happens... and they said "just go hang around in team X's channel, they'll give you a 'taco' any time your answer a query."
Given Google's promo system (where a committee looks at candidates from very different teams) this then means they'd have to try to normalize the data for it to be useful.
Even if it is - don't be that manager of the group with the least group kudos/tacos?
Is the goal of using something like this to help people show more gratitude or is it for performance feedback?
And can those two things coexist or do they conflict with each other?
Would love to hear your thoughts.
I don't think they should be used for perf as they are not intended to be objective feedback.