Wikipedia is celebrating its fifteenth birthday today, which is practically ancient as far as Internet years go. In those fifteen years, the website has not only managed to supplant Britannica as the dominant reference work in English, it’s become the seventh most-trafficked website in the world, and all of this was done without making a single profit. That being said, the website has still managed to accumulate $250 million in fundraising over the years to cover its operating costs, but it doesn’t want to be reliant on its current fundraising model forever, which is why it’s launched the Wikimedia Endowment, which it hopes will accumulate an additional $100 million by 2026.