You are not "the mainstream" for Facebook. Sure, many mainstream focused products are not going to get everybody. The point is to get critical mass across a bro

You are not "the mainstream" for Facebook. Sure, many mainstream focused products are not going to get everybody. The point is to get critical mass across a broad enough demographic, not to get every single person on board. One cannot refute the iPhone's popularity by saying "but I hate it and own an Android phone". One needs to look at sales data and trends and even then correct conclusions are not always immediately clear from the data at hand. Arguing against Facebook being mainstream from the get-go by saying "but I don't like it" or "but I don't use it" misses the argument. A few people who don't like it does not argue against its mainstream appeal. A better argument is that, of course with 20/20 hindsight Facebook seems like a great, popular idea with mass appeal just waiting to take off. But in 2003 that wasn't at all obvious.