Will this undermine most of what makes IAmA special? Probably. But Reddit leadership has all the funds they need to hire people to perform those extra tasks we formerly undertook as volunteer moderators, and we’d be happy to collaborate with them if they choose to do so.
More mainstream appeal and younger users joining doesn’t really help with the quality of the discussion. IIRC when I created an account at reddit in 2011, the active users is still under 50 mils compared to 500 mils. Eternal September is a very real thing.