I'm on my 6th WU. Three have been small, three have been 600 pointers. My graph looks like a yoyo - I fall for the 3 days it takes to put out the 600 pointers.
Interesting stuff.
Look at it like investing for retirement... daily value might fluctuate, but over time there's more and more. After a while you should have a fairly predictable daily / weekly average point accumulation to look forward to.