not only alt coins though. you can also trade your rupiah to bitcoin for free if you become the market maker
but then you'll get pending orders and sometimes IMO it's better if you just pay the 0.3% fee to avoid the risk of the volatility price that strikes practically every minute
I prefer to use both. I usually just use the limit option when I want to buy bitcoin in a cheaper price but I don't have the patience to wait for it so I just set my own price and let it be
true, well it's not like they charge us 1% or anything right? 0.3% doesn't make that much difference