Comment by Lunar_Lamp

I didn't - that was an estimate (in the same way your $100/customer was).

However, you're missing that the price is $9.99/month/user, not per year (for some reason I used $11.99, which is the price when not billed annually).

So it's 30,000 customers * 100 users * 9.99 * 12 ~= $360m per year. Your $30m is per month.