You can read the product description (still here on AppSumo):
"Unlimited content generation for individual prospects via the Chrome extension" (for all tiers).
Then after their AppSumo campaign ended, they changed "unlimited" to 150 credits/month in the plugin (for Tier 1). i.e. they sold unlimited content generation, but what they actually deliver is... 75 pieces of content a month. Considering that their FREE plan (available on their website to anyone) gives you 100 credits (50 pieces of content), basically they fooled all of us here and sold a glorified free trial with only 50% over what they are giving away for free to anyone.
Selling an LTD with a big promise and then instantly going back on what was promised and failing to deliver what was sold is pure deception. AppSumo, if you are reading this, you should force them to refund all the LTD buyers who were misled and sold a bill of goods - they are clearly in violation of AppSumo's terms.
If you are still within your 60 day refund period, I suggest you go for it before it runs out - that's what I am doing.
Instant refund and I blacklisted both the product and the founder to remember never to make the mistake to buy anything from them again. No matter how good a product is, if the founder thinks it's acceptable to deceive their customers and early supporters, they don't deserve to succeed.