Thanks for a response, though I'm still not very happy about this.
As an example; there is currently a very sensitive thread in active convos that is running in bereavement. There is the OP, a message of condolence, then a bloody 70% groupon ad or whatever it is. It really does feel like you're trivialising certain threads by putting ads slap bang in the middle of replies two and three.
Is it really appropriate to advertise anything one post after an OP wanting to discuss the death of a loved one, or to ask for help to escape domestic violence? A mother at the end if her tether asking fir breastfeeding advice in the middle of the night?
Putting adverts inside the text of a conversation really does feel like an intrusion, and given the serious nature of so many threads on Mumsnet (which incidentally is something I believe to be one of the strongest points of this community), this feels like a step too far.
I'm not against ads (though I generally ignore them), but I feel very strongly that their current placement on the mobile site is a mistake.
I certainly wouldn't consider posting a sensitive thread myself with the knowledge that you will then use that thread for the purposes of advertising.