If someone paid a Playlist Curator to host music on the curator's playlist, without any disclosure of the payment, would that be illegal?
US Title 47 Section 508 states this kind of behavior is illegal for commercial radio broadcasts:
(a) Subject to subsection (d), any employee of a radio station who accepts or agrees to accept from any person (other than such station), or any person (other than such station) who pays or agrees to pay such employee, any money, service or other valuable consideration for the broadcast of any matter over such station shall, in advance of such broadcast, disclose the fact of such acceptance or agreement to such station.
(g) Any person who violates any provision of this section shall, for each such violation, be fined not more than $10,000 or imprisoned not more than one year, or both.
Are there any laws like this pertaining to services such as Spotify?