The CHWV editorial recommends the 10-purchase rule for bonus-buy sessions: budget at least 10 full purchases per session before opening the title. A ₱50,000 Mahjong Ways 2 bonus-buy implies a ₱500,000 minimum session bankroll.
Why 10 purchases
Variance on individual bonus-buy rounds is high. A single round can return 0× (dud bonus) up to the ceiling. The 10-purchase window smooths variance enough that the observed RTP-while-bought converges toward the published figure.
Session sizing tier
- Entry VIP (₱5,000 base purchase): ₱50,000 session bankroll
- Mid VIP (₱20,000 base purchase): ₱200,000 session bankroll
- High VIP (₱50,000 base purchase): ₱500,000 session bankroll
Any session sized below 10× purchase cost is a variance gamble, not a bonus-buy session.