It's hard to make legitimate money from hosting porn. Most people don't want their ads next to porn, so you either need to have sex-related ads or a subscriptio

It's hard to make legitimate money from hosting porn. Most people don't want their ads next to porn, so you either need to have sex-related ads or a subscription fee. Twitter and Reddit have kind of built legitimate businesses on porn hosting, but they also host a lot of non-porn that makes them seem more legit. Tumblr wouldn't have that.