Things that have more “incentive-y” vibes are those that are more associated with selfishness and vices like greed. Money: incentive!! Admiration of your peers: incentive???
Another word for “incentive” that can be used in this context is “temptation.” It can be revealing to reread economistspeak policy recommendations after applying a mental search-and-replace along these lines.
emojis
UML
certain ubiquitous GUI conventions (☰ for a menu, > and ˅ for collapsable sections, the “home” icon, the “save” icon, escalating vertical bars for signal strength, %-complete bars, etc.)