Never let the facts get in your way. You have no idea what you're taking about since you're not in this league. But a few comments.
1) You can't pick-up a starter the day of the game, it must be done at least the day before.
2) Since you didn't know what streaming was, it's not surprising that you still don't get the concept. In this case we're discussing Dipre ( although it could be anyone ). He isn't looking to upgrade his pitching staff with a quality replacement. He's looking for the best available pitcher that's starting that day. He's then going to immediately flip him with the next available pitcher, and so on.
3) You're saying that it's okay because the other team can do the same thing. This makes no sense. If they are leading in ERA and Whip, why would they, or should they, have to resort to streaming to attempt keep up in K's and QS's. By doing this they would now be risking four point categories.
4) A cap would be on the number of acquisitions per week. It has nothing to due with how you set your roster. Also, you can't make a game day acquistion.
5) So let's look at Dipre's activity for this week. He made 12 acquisitions, 10 pitchers and 2 position players. Most of witch are no longer on his team. The next most active, Keeper, had five, 3 pitchers and 2 position players.
Since you aren't in our league you have no say in our internal matters, Therefore, further discussion with you is not warrented.