Fair point, but what can Substack actually do about this? Maybe they can forbid insertions from ad networks technically and in their TOS, but at the other extre

Fair point, but what can Substack actually do about this? Maybe they can forbid insertions from ad networks technically and in their TOS, but at the other extreme end, there’s almost nothing they can do about submarine articles. What if someone set up a Wirecutter analogue (but being paid for reviews) on Substack? At the end of the day, it is fundamentally a platform for sharing opinions.