Ok, so for what it's worth, here's my assumption from what I know of the man:
Kano will aggregate your dust payouts until they cross the non-dust payout threshold, then pay you. Pandering to anything below that would be "ridiculous, unsustainable marketing hoo-ha" if my spidey-sense is correct.
I suggest that you do not succumb to your knee-jerk reactions of "scam". Kano is direct and concise, even prickly at times, not to be mistaken for "incorrect", "unreasonable" or "scammy". Kano is always precise (to a fractional satoshi in my experience), and overtly so.
That is incorrect, those dust payments accumulate... in his wallet. They've sat there for three years. He 'occasionally manually pays some of them out' as he sees fit, or doesn't, shrug.
Kanopool subsidizes 'low fees' by ripping off the weakest miners in the pool. The biggest members of the pool are indirectly profiting from the theft of what is due to the smaller contributors, in the form of lower fees for them. It's 0.9% for the bigger, it's up to 100% for smaller. Maybe that's why they have such glowing statements in his support... he's basically bribing them.