For some reason people have this belief that Produce and its knock offs produce instant successes but when you actually look at it, it is such a flop fest.
Successful groups: IOI, Wanna One, Iz*One, ZB1
Semi success: Kep1er
Flop: Fromis_9, Classy, El7z Up, UNB, Uni.T, 1the9, whoever won Peak Time, and finally my favorite, Mix9, group that YG didn't even bother debuting.
Although Produce and the direct successor Planet999 itself have higher rate than the rest, still it is not perfect, as even Iz*One whom I put into successful groups didn't have a hit song. And I am not even sure Wanna One has one either. With Kep1er even album sales went down.
If you like survivals then just watch when big companies do one for their groups, like Hybe with R U Next, or JYP with Nizi, that way you know for sure that the debuting group won't just rely on the show's success but will have continuous support of the company they're debuting under.