What if Runes was introduced to save BTC and corev to keep the miners. This is a pure subsidy. Normal Runes collectors just don't have that kind of money.

It is more effective than pumping the price especially now when price pumps just comes up against a huge sell wall.

It is still unsustainable long term. See if the situation changes after 100 blocks.

They will need 4 BTC in transaction fees per block. I belief the ETFs hold more than 270K BTC so 4 BTC for 1000 blocks 4K BTC is affordable. Just to the next difficulity adjustment.

Their risk is that BTC price may fall below say 40K, or miners could dump after 100 blocks but then they are possibly also mining themselves so really paying themselves too.

Biggest danger is still CSW now and even after if they make it to the next difficulity adjustment.