I can afford the $10 requested for water but I will never pay $0.01 for water. I am yet to put my head around people that are stupid enough to pay for water. And the fact that people buy bottles of water on the plane or at airports amazes me considering you can ask the flt attendant to pour you a glass from their larger bottle of water.
1 Not on Spirit! No free water
2. You do realize that the FA is not your "server" but in charge of your safety (and I have been on flights where the turbulence was such that they never served anything)
That said, I just fill up a bottle after security at a water fountain.