This has happened quite a few times actually. Big accounts that upvote my content on Steem will often not do the same elsewhere after the fact, which is fine.
However, there's a lot to be said on this topic. For one, it shows the power of open-source tech and how forking code is actually an expansion of value.
I'd also like to point out that even though Steem is fully centrally controlled that doesn't mean it's going to fail. Decentralized leadership can't really compete with strong centralized leadership. The only problem with centralization is that it often becomes corrupt, which is why we're all here in the first place. If centralized power structures had never become the top-heavy cesspools that they are today blockchain would be completely pointless.
Many people think Steem is doomed to fail no matter what. Well, what about every other centralized system out there? How many websites pay people to blog? How many websites pay their users to ________? Just because Steem is centralized doesn't mean it won't succeed, especially over the next 10 years.
Any cool dapp Hive builds, Steem can clone with relative ease, and vice versa. Whether we like it or not, we are linked at the hip, and we shouldn't be so cynical of our sister chain. Our fates may very well be linked. There is no competition in the open-source economy. The only thing that can bring a network down is its own incompetence, irrelevance, or greed.
That being explained you all know where I actually stand on this issue.
nuff said
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