Yeah, I found the opposite for me, as I expected. I did a little under 400 queries in the last 30 days. I could definitely cut down a lot of redundant or simple searches to get under 400, but given how ubiquitous it is for me to simply so random questions (or simply search around a lot for documentation via search engine) I'd rather not have to worry about it.
On top of that, this is during a month without any job (where I'd search even more on the clock). I hear it's 1.5 cents per query over but I can imagine doing 600+ searches once I'm employed again.