You are 100% not liable. As a matter of fact, you can sell your footage taken under a 44809 flight. Suppose this same scenario, but instead of stealing your imagery, they ask if they can buy it. You're 100% allowed to sell it.
When I reached out to the FAA about this, they sent me the following "guidance". This is not law, and does not override the TFR, but you can use it to reason with any agent that rolls up. And if you land when they tell you to (notice I didn't say...
The max AGL of AMA fields are all decided on a case by case basis. As far as VLOS, that club rules require you to maintain VLOS at all times. So I'm guessing if you want to fly at 2000' AGL, you better have an aircraft large enough to see at that...