Todoist is profitable

• Build a very popular site and get revenues through ads (MySpace, Facebook...)
• Build a popular site and sell it (del.icio.us, Feedburner, Reddit...)
• Build a profitable site (37 Signals, Mint, Shopify, ...)

Running a site without a business model is dumb, so I had to find a business model for Todoist. What should my aim be?

I choose to make a profitable product, why?:

• I don't believe in ads for web applications (for example, I haven't once clicked or looked at any ads in Gmail)
• There is too much luck involved in selling out

1 week ago I worked very hard to pull out Todoist Premium, an extended version of Todoist that cost 3$ pr. month. And you know what, it's been a success. Todoist is now profitable, i.e. hosting expenses are paid :)

There are few things more satisfying than having people find enough value in your ideas and products to trade their earned money for what you’ve produced. It’s primal and wonderful and every vendor should experience it. It’s great business and it makes your business great.