Every miner sooner or later faces the need to increase income. The size of the farm does not matter. There is a need to buy video cards, ASICs or ASIC firmware. Many of course choose the latter option. I also change the firmware from time to time, the last time I downloaded this one:. https://ultramining.com/en/firmwares/bitmain/antminer-s9/ I liked the fact that there is an opportunity to choose overclocking options based on your power, try it yourself!