Firstly, the main urge to purchase the tier 3 was to get as much credits out of it to generate content
At the original time of testing, it had cost 4 credits per second of low quality video (there is a high quality option that costs (12 credits per second).
They all of a sudden bumped the low quality video generation credit cost to 6 credits per second.
Who is to say then that they won't bump that up even more and so what you paid for originally ends up being less than what you will get in the future.
With AppSumo, this has been the trend with many of the companies from my experience, changing plans and even going out of business. AppSumo also does not intervene after that 2 month window for refund.
What I am plaining stating is that this will continue to cause these unfair practices.