I don't mean to be harsh, but I think your idea is bad. You want to become the 251st clone of an unprofitable website with no clear revenue path? Your spin is

I don't mean to be harsh, but I think your idea is bad. You want to become the 251st clone of an unprofitable website with no clear revenue path? Your spin is that by asking a different question (and ignoring the fact that 98% of the posts on Twitter aren't exactly answering "What are you doing" anyway) you will somehow establish a worthwhile site? Then, let's say that you managed to obtain 1 Million active users, meaning you would have collected $2,000,000. You would quickly find that your overhead to scale and support such a site would probably take you about $8M US to get there (this is VERY rough guestimate on my part from some direct related experience). Ads aren't going to make up the other $6M. Again, not trying to bash you, but I don't see the "business" in your proposal. If, however, you want to get some experience with all the variables and moving parts in scaling a web business, this might be a worthwhile exercise to sink a few thousand dollars and a year of your time into.