Rei Network is very useful with a network that will make it faster and at no cost at all. But this becomes a big question, if in the blockchain network there is no fee for each transaction how can REI coins be mined? or even how the coins from the center are distributed if like that
maybe they are offering such features for now. but later on, once there are projects deployed and many users are using their network, they will adjust their services. for now, they need to attract potential devs or users as many as possible. once their community is growing, that's when they will start thinking of charging these users. they can always evolve here if their development is continuous.