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Not sure what the company actually does as a business model though, the only have one app that was highly successful for a small period of time, cryptokitties, will they be successful again?

I think so, as mobile phones are now coming with the Dapp Preinstalled, namely HTC https://www.htcexodus.com with their Blockchain Phone "Exodus 1" and after Google and Samsung's investment, its likely Samsung / more Android phones come with CryptoKitties preinstalled.

So, since their reach will now increase massively, I do believe they might be successful.

But in the world of Blockchain / Tech anything can happen.