Vanilla 6-8 players, std speed:
- Peaceful - 2h per 20h game
- Warmonger - 20minutes per 20h game

With BBM mod, where strategic resources cost almost nothing, hence you are not trying to trade it:
- Peaceful - 30m pers 20h game
- Warmonger - 10minutes per 20h game

Still have to check the resources tab to understand wich lux I have among players, it takes solid time.

Therefore for vanilla gamer with 1000 hours it gonna be approx 50h = 2 days, or 5% of time. Mind that will be only serious gamer on a decent difficulty level, who struggle and thinks to win.

Average human life in Europe is whoopish 80 years = 29200 days.
Hence to save 1 human life there you must count 14600 serious gamers with 1000h

Now this mod has almost 1million subs.
But it was rated by 10thousands gamers.

Lets presume, that average sub is quite eveolved gamer to know about mod, he must have 300h+ in average.

And presume, that only very evolved gamer will rate this mod, 4000h in average.

Hence I presume the average time among all subs is about 400h.

All subs in total spent 400_000_000 hours, so 5% = 20_000_000hours.
Divide it on EU human life duration and get 684.9

Conclusion: this mod saved 684 human lives.

But if you appreciate the time when you can actively have sex, this time is triple smaller, then it gonna be 2000 adult lives.

Answer: 2000.