[murukesh_s]

Not always creators puts the content for free free, they expect views, gratitude, and/or ad revenue..

[skeledrew]

It's not free if there's any kind of expected return.

[rightbyte]

If the return is also free, yes. A smile or a thank you is free to give.

[juliangmp]

Attribution would be one thing. See ooen-source and free software licenses.