There are two things that affect how your abs look.
1) Muscle size
2) Bodyfat
The latter is arguably more important for making them visible. Once you can actually see than, 1) comes more into play.
But, given those two things, why do so many reps with such a variety of bodyweight exercises? You can't spot reduce fat. And doing those won't build muscle. Would you do 100 reps with a 10 pound dummbell to build your bicep? Hell no.
If you think your abs need to be bigger, do a weighted exercise such as ab curl or low pulley cable crunch. If you think they need to be more visible, lose fat. I don't understand why people want to separate the rectus abdominus from all other muscles in how they train them.
-casualbb