This is not true
#Chainlink oracle networks today are secured not only by nodes reputation on the line but also by the opportunity cost of losing future income if nodes act maliciously
These nodes lose ALL future revenue in the #Chainlink economy, which is substantial given the P.A. and utility of $LINK
feeds.chain.link
Free open APIs are slow, unreliable and insecure for any high value contracts requiring oracles
medium.com/@chainlinkgod/…