Already answered this, but I'll comment because you bothered to. Sure :) We're basicly two founders that have done most of the design and project management of the site. In addition, we've outsourced some design and all of the programming to Ukraine, including the mobile version. The outsourced development itself runs into the 100k's over the stretch of 1.5 years, and in addition, we've done some marketing (40-50k) and had some administrative costs (lawyers, offices, etc.). I don't have an exact sum, but it's anywhere from 190-220k.
I'm a designer and previous developer myself, but the site is actually quite broad. There is a lot more than meets the eye, such as:
- an administration area
- caching and indexing mechanisms
- web scraping robots
- various other agents and robots to update user feeds, top lists, etc.
- algorithms to calculate relevance and weight for the items on each list
- Wordpress plugins, possibility to embed lists, etc.
...and so forth. It's a pretty big site.