Because nothing worse calls. Worse could bet hence the c/c, plus you have some bd draws. Really, your villains are loose, but one is on the passive side and one a bit aggro. MP is the more aggro one (based on 3b) and mp1 is more passive. So check call against MP, c/f if mp1 raises or leads if opens. If MP bets and mp1 calls I'd fold too as their ranges would def be ahead and your draws aren't strong enough. Against just am MP bet you may be good now plus have the bd draws which is enough to see a turn.