> Assuming there's a bidding system, wouldn't transaction cost tend to zero? Well, that depends. If there is extra space in blocks, then yes the fees tend tow

> Assuming there's a bidding system, wouldn't transaction cost tend to zero? Well, that depends. If there is extra space in blocks, then yes the fees tend towards zero (or very low costs, at least, zero is not exactly accurate, even in cases where there is extra block space) If blocks are "full" and there is more demand for this space, than there is extra space, then they do not tend towards zero, as transactors are bidding on a limited supply of space.