This week someone metering LLM calls asked for help with a sentence. He has to state a usage allowance on a pricing page, and neither way of writing it works. "3 million credits" is honest and means nothing to a buyer, because no human can picture three million credits. "About 1,500 generations" is legible, and it becomes a lie the moment usage patterns change. He wanted wording that survives contact with real customers.
Better wording is not the fix. His two sentences do not differ only in how clear they are.
It is a grammar problem.
One thing first, so you can weigh the rest properly. I do not sell a metered product. I run Referralful, affiliate software for SaaS, and our pricing is flat (free until your first affiliate, then $19.99 a month). I have never had to defend a credit estimate to a customer who blew through it in nine days. What follows is reasoning about how the sentence works, not a war story. Every number below is invented for illustration.
A pricing page gets written once and read for years
