Board Thread:Game Discussion/@comment-38518555-20190605053439/@comment-28412524-20190716135701

From my knowledge: ad providers do not share data (except they do come from one parent company). Doing otherwise in Europe requires explicit user allowance to share data with 3rd parties so it is very very rarely used

AdColony had way better quality of ads in Europe in the past (but they had much lower inventory), IronSource was way worse in terms of quality (also we had to filter out some shady ads from them). It might have changed during last 2-3 years though.