Pegging to fiat isn't a bad thing in times like these.
When the business is getting paid in bitcoin, pays in bitcoin, and works only with bitcoin and its revenue is not dependent on bitcoin price rise/fall, it makes no sense to measure things in fiat terms.
I've made this argument elsewhere about gambling sites but it also works with mixers and any other business that is always working purely with bitcoin, maybe more so for mixers since their customer count increases unlike gambling sites. Kinda like this forum's donator status still costing 10
BTC.
With that said, I wouldn't be surprised if the rates were lowered at some point since we are still living in a fiat world where 1
BTC is not 1
BTC but is X$.
Of course it makes sense. It makes perfect sense so people don't end up getting paid something silly like 30± dollars per post nor do they get shortchanged if it falls. Just because a company get paid in bitcoin, pays in bitcoin, and works only with bitcoin and its revenue is not dependent on bitcoin price rise/fall doesn't mean the value should stick to a fixed bitcoin price. There's absolutely nothing wrong with saying something like you get 5 dollars in bitcoin per post or whatever. The forum also deals only deals and pays in bitcoin but staff payments are capped in fiat amounts but are always paid in bitcoin. Its much safer and logical that way.