Build what you cannot afford to buy...

My previous company's product was a sync and backup consumer product SugarSync.

With SugarSync we wrangled constantly with our cost of storage as we launched the service, designed incentives for referrals, tried to figure out optimal duration for free trial and so on.

So I was delighted to see a post on how another start-up is dealing with this issue. It is fantastic that they are able and willing to share their solution in such detail on ther blog.