This one will work for us as a commuter but how about the owner and the driver of uber are they not affected of this offer? just thinking of it OP no offense don't know if this question is relevant to your offer I'm just thinking for the poor business owner.
The only one who will get affected by this is that the owner of uber, not the driver they still get paid regardless if it's free or paid ride 
So this won't affect the driver at all, though use on your own risk as Uber can suspend your free ride at anytime if they find out you just cheated their system