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Generally the community witnesses have technical support to keep the witness running so one doesn't need technical skills to be a witness, they need a team that contains some technical skills.

For example jerrybanfield was in the top 20 witnesses for a while.

So he didn't have the technical nitty-gritty? I saw that his witness account has been deactivated long before now

he had help to set up a witness, but in the end he didn't stay a witness for long.

Yeap, they are just marketers, and the opportunists like we can see right now. We don't just have 20 witnesses, we have a whole list of witnesses, if/when the top ones disables their nodes, next 20 will be keep working. So please just don't get fooled by marketers whos trying to turn this chaos into an opportunity..

And afaik, disabling nodes is not just oh I'm bored I'm shutting this thing down. They needed to revert the latest changes (HF20).
https://steemit.com/witness/@holger80/steem-recovered-from-the-hf20-fork-thanks-to-abit-and-its-emergency-patches an example.
It can be clearly seen who deserves a vote, who's actually solving problems.

And I couldn't find the source article but there was a consensus to revert the hardfork 20, so it took that long.

I'm not a witness nor a programmer. I just read and this is what I get so far.

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