48 hours after the experiment began (1 day after the first update) I've bought a total of 6 PLEX in 3 different regions. I've sold 3 for 40 - 65 mil profit each, used 1 to sub an account and have 2 more up for sale. I have buy orders up in 4 or 5 regions now.
From what I've seen so far, I figure at least 10 day should be possible with that kind of profit.
As many as 20 a day might be attainable with profits in the same range but even that many might be pushing it a bit. Any more than that is probably only possible with lower profit margins around 20-25 million which won't leave much after taxes and fees.
I need to move PLEX purchases quickly because I expect prices to begin going down now. It's that time of year when prices have historically gone down anyhow and the Amazon pricing snafu yesterday will only help push things along.