For me, as a GM, the biggest barriers to doing more GMing are time and funding. The new Org Play Foundry scenarios do a great deal to help with finding the time, but they make it that much harder to wrangle the funding.
I don't love suggesting this because I think it's great that people can play for free (if they own the books), but a subscription model could go some ways toward evening out the cost imbalance. Say that players and GMs both pay the same reasonable amount per month and in return they receive access to all available org play Foundry scenarios and in-game access to all legal character options. An additional subscription could grant you the same access for APs. In this way, the players are contributing to the cost of staging the game just as much as the GMs and because the pre-built scenarios are included, the bar to them becoming GMs themselves is that much lower.
Still not sure how I feel about this, but it seems reasonable.