Are people incentivized with BTC to run nodes? Bitnodes shows everyone running nodes.

Are these people incentivized to run nodes? If not, why not? If so, do node operators make some BTC from transaction fees, etc.?
Are these people incentivized to run nodes?


No. Their reasons for running a full node varies. Some of them want Bitcoin to succeed. Some of them are merchants and run a full node as part of their business. Some of them have spare computing power, and don't have a strong preference as to how it's used.  It's worked out reasonably well so far.


  If not, why not?


It's extremely challenging to prove that you're running a full node. This code pretends to be a full node, though it really just forwards requests it can't answer to other nodes.


  If so, do node operators make some BTC from transaction fees, etc.?


No. Miners receive transaction fees, although it's not a substantial part of the overall block reward. (Most node operators are not miners.)