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I know someone that recently became a hive witness @

is it the samething?

Not necessarily but it's part of it there are different kinds of nodes on hive but you need to be running some as a witness (block producer) what are you looking to do

some crypto projects need node runners

I run multiple nodes

on your PC? Do i need to leave my PC on when running the node all the time?

depends on what kind of node you are talking about. the ones i run are on virtual private servers, so i don't have to keep my pc on.

How much do you pay to run them? Can I run multiple nodes on one VPS account?

The Nexo Digital community runs a Hive node witness through nexo.witness and anyone who has a witness vote left over can vote for our witness and help strengthen our community and projects.

https://vote.hive.uno/@nexo.witness