Well it has a built in 1.5% dev fee. Say you mine 100,000 coins a day, you will give 1500 to the dev.
SBR 1.3.1 &1.3.2 supports worktips and has 0% dev fee. XMR stak 2.4.4 can be compiled to have 0 dev fee. Cast gets you going but I wouldn't use it personally.
This coin has been great for mining. My favorite coin to mine atm

I think it's fair to give devs of Cast XMR mining tool a bit fee for their works.
1.5% dev fee is enough, not too high, not too low.
