Yes, I did contact them about implementing the Lightning Network, but they have not seen anyone asking for this, so they reckon if there are not a lot of people asking for it, then it is not worth the time and effort to implement it.
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.
They should probably use a payment processor to negate the volatility problem. Requiring a confirmation within 10 minutes is crazy -- even when block times are below 10 minutes on average, I've seen 2 hour gaps between blocks. It takes time to sign and broadcast the transaction too. This can't make for a good user experience...