100 bucks for a couple scrolls is too much. Especially if you take into account that the chance of pulling the right character is far from 100%. But there is a way to get around this problem a bit and make Genshin top up price lower than in the luncher itself. Everything works through the official channel, just the purchase goes through a third-party platform, where the rate is in your favor. It turns out to be much more profitable. No murky schemes, everything is legal and safe.