I guess, picking off c-bets by checkraise became new thend these days.

Such a frequent playbacks move pressure point of all hands. It can mean sick profits if villain don't have ballz to re-play for all their chips (and sick variance if they do).

If EVERY c-bet is called, then 2nd barrel becomes your new c-bet.
If EVERY c-bet is raised, then 3bet becomes your "new" c-bet.


I tried recently this tactic:
C-bet as usual
bet/3bet/fold more flops with air
bet/3bet/call more flops with overpairish hands

Opponents will either start to 4bet push crap (and amping value of decent one-pair hands, that promoted from folding hands to calling hands) or start to play trap poker (which gets you back your FE on flop and free cards on turn).