That's not a moat, that's a red queen?

A moat allows the owner a degree of passivity. Eg, you own the desktop OS. You are already using this moat to get office software on every machine, while competitors either have to dance to your tune when publishing a program, or think of a way to get their own OS out there. You can see how the internet develops, knowing that you can get your own browser on every machine for free. You can watch for a bit before you move.

Relying on continuous inspiration is a treadmill that goes faster and faster. That's what's described here. Come up with something new and clever, someone copies it, come up with another thing. You can't be passive, you have to be moving constantly.