I run an Adult Novelty company. I've tracked various metrics since I started the company, and found some pretty round numbers regarding lifetime revenue and star gain.
At $340,749 lifetime revenue, I hit first star. I cleared $250,000 at the same time, so I think $250,000-300,000 lifetime for first star is a safe estimate. $91,676 daily revenue at the time of star gain.
At $10,074,271 lifetime revenue, I hit my second star. Clearly, 10mil lifetime revenue is the gate for the second star. $458,677 daily revenue at time of star gain.
At $20,086,734 lifetime revenue, I hit my third star. 20mil lifetime revenue for the third star. $519,506 daily revenue at time of star gain.
At $31,139,473 lifetime revenue, hit fourth star. 30mil lifetime revenue for fourth star. $477,720 daily revenue at time of star gain.
I hope this information is useful. I'll add to this post as I grow.
EDITS: See above