How exactly is what I think is best summarized as "we had a bug in our pricing system that was undercharging a miniscule number of users by an order of magnitude, and when we fixed the bug, they were informed of the price increase and we even gave them ways to mitigate, but their app architecture was terrible which made it difficult or impossible, and then after they raised a stink about it we reduced the cost/credited them enough to be mutually agreeable" as predatory?