0.10% taker fees, but
-0.05% maker that means you're paid 50% of the fees the taker pays.
I think it's a great thing for big volume traders. Also with the XCM token, they said there will be further discounts if you hold it (like BNB)
(a lot of other utility with XCM too, every fee inducing trade = 10-50% XCM bought and burned)
After reading the website, you are right it's 50% of the taker's fee, will be a bonus for the maker. Big volume traders, or whales might have a bit interesting opportunity from this but they will eventually face the withdrawal fee, comparing to some exchanges it seems low but when you want to withdraw big funds, you'll be charged a little more expensive.