Not sure how farming can be cheating, as otherwise why would Nordeus put sponsors on the game?
You can only farm by completing the offers that Nordeus accept and put forward to you.
I've got 13,000 tokens from watching videos. I've followed all the instructions and at no point does it say you can only watch the video once, so by re-watching them you can make more tokens. Occasionally the game locks you out and says no more offers, but other than that, its possible still to farm occasionally.