reactions

Reddit and Twitch both allow members to pay for the privilege of reacting to other member's content with special awards or stickers. » about 600 words

Facebook introduced reactions with an emphasis on both the nuance they enabled and the mobile convenience: “[I]f you are sharing something that is sad [...] it might not feel comfortable to Like that post.” Later: “Commenting might afford nuanced responses, but composing those responses on a [mobile] keypad takes too much time.” » about 800 words