No, I mean "dirty data" as in all your data is collected and there's very little transparency regarding what those apps/companies are doing with your data. I haven't exhaustively tested all these apps but I have tested a few and know that Apple doesn't send any information or data from iMessage to their servers that isn't encrypted on-device. Unlike these other apps, Apple couldn't leak your data or usage from these apps because it's never collected in the first place.