BN8 can be much faster. It is good advice to spend 250m as much as it possible and buy augs/server upgrades. However, there is another "free money" source that was not disabled. Casino in Aevum. Between resets you can get as much as 10b from it. Coinflip game obviously designed to be "cheated" (just look at its "random" number generator). The only difficulty with it - finding how to properly fire onchange events to input field. I finished BN8.1 without casino shenanigans and BN8.2 was so much faster, that now I using coinflip script in every bitnode.