I don't think so, unless they rebranded their game with new features. I believe MMORPG genre has superior sustainability chances on long run, because they have more features and different activities players can engage, so it's less likely to become boring.

Unfortunatelly, nobody explored MMORPG genre efficiently in Blockchain games niche yet. There is a lot of potential on it, and the developer who identifies this opportunity, while working on a serious a long lasting project will surely be very successful, possibly becoming the main MMORPG game in the world!