I've been warning people we(indies that are classical left to right) need to get off IGG. They've been ramping up to this for some time.

Luke Stone is working on his own platform if you want an alternative that takes a lower cut than IGG/KS.

If not I recommend creating your own shop, use stripe/what ever you need to in order to process orders and run your own shop.

Alternatively seek a publisher, though publishers often bend the knee to social pressure so maybe not the best option.