Just a tangible example of why our startup needs money!
On the other hand, start-ups that have a more modest outlook or vision don't need as much and actually shouldn't accept that much. Having $1million VC money pumped into a start-up that only expects to make $50,000 a month with steady growth will more than likely buckle. The investors will keep pressuring the founders and terms like ROI will be thrown around meetings like crazy.
The best thing to do is determine how much you really need (Or create a range for variables), and work from there. There's a bunch of decent (free) spreadsheets you can get from here: http://www.exinfm.com/free_spreadsheets.html
That's my 2c.
Maybe they do nothing today, but are in a closed beta with a small circle of users, and will be more public beta tomorrow...?