Just doing some figures, could be true could be false, these are...

Just doing some figures, could be true could be false, these are the prices Dropmysite charge customers

Pricing & Plans
Dropmysite has 12 backup plans designed to cover small and large websites: 10GB at $29.99 per year, 30GB at $79.99 per year, 60GB at $149 per year, 100GB at $249 per year, 200GB at $499 per year, 300GB at $599 per year, 400GB at $699 per year, 500GB at $799 per year, 600GB at $899 per year, 700GB at $999 per year, 800GB at $1,099 per year, and 1000GB at $1,299 per year

So if they only have 200000 customers paying the lowest price which is $29.99

Revenue would be close to $6 million

If you assume a low average price according to the different sized plans you might say maybe...being realistic $60 per year with only 200000 paying customers

Revenue would be $12 million

With the way they have been growing the past 2 years and all the partners they have gained, you can really assume if they have 500000 paying customers at a average  plan price of $60

Revenue would be $30 million

jumping the gun here, Just food for thought