It's not $300 a day. It's $300 on launch day. Sales always, always drop far below launch day unless you have other factors which keep the app in the news or on a "top 10" chart.
My apps have usually dropped to maybe 10% of the launch peak.
My apps have usually dropped to maybe 10% of the launch peak.
Yes, but those $300 were still made in a day as the 8th top app.
What the parent said is that $300 for each day you're on the "top 8th" is good.
If he can't be on the top 8th for long, that's his problem, and it doesn't mean people should be getting $12K for a single day on the top 10.