This is borderline related but at 25 and 50nl I have started 3 betting alot of donk bets rather than folding or floating and I am picking up alot of pots right there when before I would fold most of my air hands before.

So in short I think alot of villians donk bet bluff into raised pots or donk bet weak enough ranges that they will fold to a raise and so raising is often good until you get a read that says otherwise.

BTW, this is basically just anecdotal evidence backing me up, if it is or is not correct in theory I'd like to know more/why etc