You've got it.
Creed flacons are a good example. Here's how the pricing breaks down:
- 1oz / 30ml = $130 or $130 per oz / $4.33 per ml
- 2.5oz / 75ml = $225 or $90 per oz / $3 per ml
- 4oz / 120ml = $270 or $67.50 per oz / $2.25 per ml
- 8.4oz / 250ml = $350 or $41.66 per oz / $1.40 per ml
It's clearly MUCH cheaper to buy large and split it among friends. Board rules are no split can be smaller than 50ml. I'm not sure on the rules from profiting from hosting a split, but there have been many a backlash at unfair pricing in the past. If it's not a written rule it certainly is a community norm we've defended strongly in the past.