There are many episodes available that do not require a pay TV provider.
FOX.com and FOX NOW app
For returning FOX shows (Empire, Brooklyn Nine-Nine, etc.), new episodes are generally locked exclusively for TV subscribers for the first 8 days after airing on TV. After 8 days, these episodes unlock for all viewers. So, for example, if an Empire episode airs on Wednesday, it unlocks for viewing without a TV provider on the following Thursday.
With new Fox shows, the most recent episodes are unlocked and available for all viewers the day after airing on TV. For instance, when a new episode of a first-season show airs on Tuesday, anyone can stream it on Wednesday.
For all FOX shows, the most recent 5 episodes aired will remain unlocked at any given time. For instance, once episode 6 of a show becomes available for streaming, episode 1 will become locked exclusively for TV subscribers (or no longer be available at all), while episodes 2-6 will now be unlocked and available to all viewers.
FXNetworks.com, SimpsonsWorld.com, and FXNOW app
To stream all available full episodes on FXNetworks.com, SimpsonsWorld.com and the FXNOW app, signing in with a participating TV provider is required.
NationalGeographic.com and Nat Geo TV app
To stream current season episodes on NationalGeographic.com and the Nat Geo TV app, signing in with a participating TV provider is required. When available, past seasons of shows are unlocked and do not require signing in with a TV provider. For new shows, available episodes are unlocked and a TV provider is not required 60 days after the season concludes.