Isn't this putting the cart before the horse? Why force pricing tiers such that it matches an abstract principle? If you have an e.g. [x, 10x] pair of plans, and a few percent of subscribers are on the 10x, the Pareto power law still holds. In fact, I've heard cases where it was beneficial to have a lower multiplier between tiers, so people feel at ease to upgrade. A 4x jump is a tough negotiating position to go after expansion revenue.