I'm looking for startups that have had no/minimal revenues, and took at least two rounds of funding, and then suddenly
exploded into profitability (or, are now exceptionally profitable)
Google took Angel, and then VC of $25M ... but (according to pg) were profitable before VC.
Salesforce.com had raised over $50M by 2000, and is very successful today. PayPal raised something like $225M (remember getting $5-10 free for signing up?) and is the shining star in the dying eBay galaxy.
I'm sure I'll think of others...
Edit: Also, eHarmony, which raised well over $100M and is supposedly profitable and happy now.