I did ask them to increase the 10 minute confirmation window, but they say the volatility will eat into their profits, if the price goes down, like it is doing at the current moment.
This is silly, volatility doesn't mean "negative price fluctuations", there are just as many chances to get profit off it, if the price goes up while they wait for confirmations and in the long run it would all even out. They are just shooting themselves in the foot with this stupid policy, because they have to deal with refunds and just scare off customers. If they are so scared of volatility, they should accept Bitcoin as a deposit on their site and allow to spend it as soon as it gets 1 confirmation.