My friend said that she had an "Aha" -moment when she realized that Favor = Giving money to a great street artist.

Give as much as you like - if you like!

That's it! It's real money and yes it's goes to the artist. 

Using real money instead of "likes" and "points" might be little daring, but in the end, that's the thing that really matters. Great art deserves a reward.

Is it right to charge for comments?

...see what I did there? Advertising something that doesn't "belong" here. "They'll probably remove it", "you should stay on subject"...

...not in Favor!

Favor is about freedom! 
Not free as in free beer - free as in free speech.

Yes this requires a payment - but the money goes to the artist, or the publisher. It goes to whoever created the favor (which is free btw.)

And while commenting in Favor has a price, it is a price you choose. With the minimum as low as $0.10, I think everybody can afford a return. And when creating cool content, every penny counts!

Thanks, favorcompany! I hope this helps you to create more.