We talked about this on the podcast. You can purchase seats to all 4 meets today.
You can get VIP seats for all 3 days of track for a very reasonable $200 in each city. You can get in the door any day for $25+ in the US ($60 all 3 days) and $10 in Jamaica for 1 day
to buy tickets
They also released schedule of events by day. 800/1500 will always be on back to back days because the 3000/5000 will also be some combo of Friday and Sunday.