you are full of shit.
Nah, they're right. Some of the upgrades combine multiplicatively with each other making them ridiculously broken.
Extra item chance, amount, and rares combine multiplicatively with everything. Power, crit chance, and crit damage are multiplicative with the first 2 being great early on. Explosive chance + damage are multiplicative with each other with explosive's base damage far out pacing anything else available for how little it costs to get it.
With my terrible 7 clicks per second I'm just about at the 7 min barrier. The other guy probably clicks a lot faster than me.