After Google, free is not a bad word. We can offer the very best services and products for free and still make a huge profit. Have you ever tried that kind of promotion or business strategy? Did it help?
We are a free service. Everything we offer is for free.
Do we make huge profit? No, but it can be done. At some point we can go full power, buy articles, run giveaways, offer discounts on popular products and support partner websites and so on.
There are a thousand ways to monetize a website and still offer every service for free.
You have to be careful. When big companies offer services for free, they often do so for the purpose of collecting data to use for marketing purposes. That's how Google makes money.