I think the meaning is pretty clear. Dishonest/misleading sources of information are intentionally designed to have a vary low barrier to entry, while trustwort

I think the meaning is pretty clear. Dishonest/misleading sources of information are intentionally designed to have a vary low barrier to entry, while trustworthy sources are forced to use off-putting paywalls due to the inherent higher cost of what they do. Hence the asymmetry.