Fun fact: for me, FlowScape on Steam is only marginally more expensive - itch.io charged me 12,30 USD due to added VAT (which on Steam is already calculated in the price, as required by EU laws) while the Steam price for me is ~13,80 USD. Also due to regional pricing, there are lots of regions (more than half actually) where it is significantly cheaper on Steam than here (the lowest is ~3,27 USD in Argentina). So Valve's reasoning for not allowing you to sell the game cheaper elsewhere is "a bit" flawed in that respect but that's nothing new. ;-)