That's still speculation and even ardor's main chain doesn't have an important role to the economic activities and could we call this child chain will be a success? Honestly, i never saw any real usage from any blockchain project like this one and its purpose to create childchain.
yeah, like Ignis before, untill now how about them, nothing any innovation untill now, and honestly i don't innterest about MPG, if they are serious intend to build an ecosystem why not use another platform