Totally agree. It's perfect competition (or something close to it). When you have low barriers to entry for relatively similar goods, enough sellers will enter

Totally agree. It's perfect competition (or something close to it). When you have low barriers to entry for relatively similar goods, enough sellers will enter into the marketplace that you won't be able to profit enough that it'll be worth your time. You'll still probably be able to make some money, but not enough to merit continued publishing.