disburse_feast_reveler_rewards

disburse_feast_reveler_rewards = {
	if = {
		limit = {
			has_trait = lifestyle_reveler
			scope:activity = {
				has_activity_option = {
					category = feast_option_courses
					option = feast_courses_good
				}
			}
			scope:activity = {
				has_activity_option = {
					category = feast_option_food
					option = feast_food_good
				}
			}
		}
		add_trait_xp = {
			trait = lifestyle_reveler
			value = 15
		}
	}
	else_if = {
		limit = {
			has_trait = lifestyle_reveler
			scope:activity = {
				has_activity_option = {
					category = feast_option_food
					option = feast_food_good
				}
			}
		}
		add_trait_xp = {
			trait = lifestyle_reveler
			value = 10
		}
	}
	else_if = {
		limit = {
			has_trait = lifestyle_reveler
			scope:activity = {
				has_activity_option = {
					category = feast_option_courses
					option = feast_courses_good
				}
			}
		}
		add_trait_xp = {
			trait = lifestyle_reveler
			value = 10
		}
	}
	else_if = {
		limit = { has_trait = lifestyle_reveler }
		add_trait_xp = {
			trait = lifestyle_reveler
			value = 5
		}
	}
	else = { #progress towards reveler
		custom_tooltip = {
			text = progress_towards_reveler_tt
			reveler_points_gain_effect = {
				CHANGE = 1
				RANDOM_CHANGE = 1
			}
		}
	}
	# LEGITIMACY GAIN FOR STANDARD ACTIVITY PARTICIPATION - FEAST
	standard_activity_participation_legitimacy_effect = yes
}

As written in game/common/scripted_effects/00_activity_effects.txt.