Don't know if anyone else has had this but thought this might be helpful feedback for MN! I've noticed that recently I've started getting quite wide ads mid-thread (using mobile site). I have no issue with seeing ads, but because they are quite wide and because my brain associates ads with the end of a thread, I find myself regularly thinking 'well that's a short thread' and closing the tab. So I'd say these ads are inadvertently causing me to spenn less time on Mumsnet and thus be less likely to engage with any ads!
Has anyone else had this Pavlovian reaction to the in-thread ads, or is it just my pregnancy brain?!