Purchase games across platforms?

Having originally bought a number of COG titles from Steam but now being in the position of travelling a lot with only android and iOS devices at my disposal, I am wondering whether there are any plans to allow for purchase of titles across platforms or easier ways to access games already purchased on different devices. I realize that due to license restrictions and different activation formats (as well as different stores taking different cuts of the purchase), it’s probably not always easy to do, but I would appreciate being able to either buy a “all platforms” version at a reduced price vs. buying all platform versions individually, or just being able to at least activate the browser-based version if I have the game on any other device.

There’s currently only one possibility I’m aware of.

Please ask any additional questions you might have on that thread. All these loose threads don’t make it easier to find stuff.