| Technique | Implementation | |-----------|----------------| | | New users start with 50 free sweepstakes entries after first game. | | Loss Aversion | Timers flash red in final 30 seconds; unused power-ups expire daily. | | Variable Rewards | Random “bonus entry” amounts (e.g., 2, 5, or 50 entries) on level completion. | | Social Proof | Leaderboards show top winners (e.g., “Mary from Ohio won 1,000 entries yesterday”). | | Sunk Cost Effect | After 5+ minutes on a hard level, users pay 25 virtual coins for a shuffle rather than abandon. |