That can be possible in theory yeah but in order for these aggregators to work well, the participants usually also send their own data and this makes it clear p

That can be possible in theory yeah but in order for these aggregators to work well, the participants usually also send their own data and this makes it clear price fixing. If you send your own prices and then you get other prices back in return, it's 100% price fixing without any doubt. That what's making it different from a market study.