I’d say no, it wouldn’t be better.
First, nobody reads docs. If your pricing page says “84K/day”, everyone normal assumes it is what it is, and not “yeah but we do not enforce it”.
Second, if you do not enforce it, why mislead people anyway? Describe it is as it is. And what does it mean “planning to send an alert”? OK, you alerted me and I don’t give a damn and use some 400K a day. What are you to do? Enforce it? Then you are enforcing it, or planning to - and saying otherwise in the docs would be a lie. Letting me have it? Well, then you’re open to abuse big time.
Third, the issue of weekdays/weekends still stands - average weekend traffic can be 10x smaller (or larger) than the weekday one; A fixed per day ratio just doesn’t make much sense, IMHO.
A “$100 per 2.5M” price tag also allows new consumers to ramp up the usage gradually. There are smaller guys who will find $100/mo price too high - simply because their traffic is just too low still. But they may grow bigger (good luck to them!) eventually. The “$100 per 2.5M” would allow them to spend these $100 over a year or two at first, and then over shorter and shorter duration - and that would be fine with them because that would mean their traffic is growing too.
(Having said that, I’m very far from the pricing in the geo-tagging industry, so all my logic can be flawed at lot)