Why are $BSV fees so low how does it run?

Unlimited BSV block sizes means the market doesn’t compete to secure their tx within the block.

BTC has an artificial limited block size of (1MB?) that can only fit a limited number of tx. The people willing to pay the most get their tx into block.

Any cons to having a large block size?

My understanding is the chain could die if there are not enough transactions taking place, which feeds the miners and keeps them mining.

Block reward also feeds miners, and is like a subsidy that reduces by half every few years. Eventually..

.. the block reward will be too small to satiate the miners, so they will have to rely on tx on chain to stay profitable. If tx count is too low, then miners must find their food elsewhere or die.

BSV needs to grow ecosystem to live.