Yeah, it's awesome!
Just wait until you have over 400 diff modd! If you have almost 500, you'll get almost 3000 per run!
However, do not, I repeat, not, go Beyond the first teleporter, and do not go in any other folder, as most of the other viruses will kill you in no time, and they are almost invinsible to Your attacks because their defence stat is so incredibly high.
The first viruses in the program files Level are the weekest viruses in the intire game, I think. You can kill them With one hit on difault stats, and With four knife hits With attack of 375 on diff modd 490. Even if you have 490 diff modd, they still only do one damage to you per hit if you have a defence stat of 375.
I use this a lot, not only to grind bits With diff modd on my main save, but if I have a New save file that I wanna Upgrade, for example. Sure, it takes way way longer because you only get six bits per virus, but trust me, it Works.