While this is true on some level, the challenge is that we'd have to set pricing at an inefficient point (i.e. we'd end up charging more than some businesses can afford to pay and less than others are willing to pay). If we charged $1/sub/mo (say), $5/mo subscriptions would be prohibitively expensive. At the other extreme, if we charged $0.02/sub/mo per month, it just wouldn't make sense to invest as much in improving the product, which would indirectly hurt businesses by depriving them of a counterfactual product that they'd like to be able to buy. Pricing is obviously always an exercise in trying to find a reasonable trade-off between simplicity / optimality and this is our best effort.