Question on Plus and Pro Sub Features

Is there a list or FAQ somewhere that tells which of your sub features can be used in a game run by someone else? If the person running the game is a Free member, which of your sub features will not work in their game and which will? Will none of the advanced features work, will any of the APIs work, etc? Is everything based only off the creator of the game? So if you are just a player and don't DM any games, are only the out of game benefits going to work for you? Thank you.

Character vault and no ads are the primary features that work for a player subscriber. Almost everything else is geared towards a creator of the game. Subscription information page has the list of all the features but they are not defined by player and creator, just plus and pro.