The exchanges have a per-trade charge, and for the data, they charge fees on a per data stream basis, and charge for colocation.
And they already do make each tier more expensive than the previous.
Mm good old days of dialup. All yours for $900/month.
The exchanges have a per-trade charge, and for the data, they charge fees on a per data stream basis, and charge for colocation.
And they already do make each tier more expensive than the previous.