III there are reports of people in on monday and saturday. monday 2002 was only 7000 peeps, the BLM (and i read it here posted by someone on the gate crew) gets updates as to how many people crossed the gate every 4 hours, you can also see those numbers updated on the board at playa info.
Also again i've seen the 5$/person/day figure on the BLM site with regards to general public camping on BLM managed grounds. they had it as 5$ for desert and 6$ for forest i think.
the llc has been fighting (and hence the gate searches) the idea of a fixed fee and have been assuring the BLM they can provide accurate census data per day. I'd say that it's 30,000 only for 2 days and 20,000 for friday
15,000 for thursday and less then 10,000 for monday tuesday and wednesday. but i don't have that data, it's just an assumption.
besides you don't know yet how much did the LLC pay BLM this year, the 550,000$ figure is from last year with a 28,000 census
Shit, where was i for the last week... ehm...