If PR is good, maintainer refunds you ;)
I noticed the same thing in communication. Communication is now so frictionless, that almost all the communication I receive is low quality. If it cost more to communicate, the quality would increase.
But the value of low quality communication is not zero: it is actively harmful, because it eats your time.
But a non-zero cost of communication can obviously also have negative effects. It's interesting to think about where the sweet spot would be. But it's probably very context specific. I'm okay with close people engaging in "low quality" communication with me. I'd love, on the other hand, if politicians would stop communicating via Twitter.