Entering a market that has economy of scale (serving 1000 users cost the same as serving 1 user) need a big marketing budget and a sales team and it can take years until you have enough users to become profitable. So unless you have a lot of money beforehand compete at something that doesn't scale (for anyone right now). So it will cost the same ballpark to serve your first user as it will cost an established business to serve +1 user.