I’m trying to run a study that has a UK nationally representative sample as well as filtering out all people that have taken other surveys we’ve run (around 19,000 people).
When I put all their Prolific IDs into the custom blocklist, it says I have around 27,000 eligible participants left. But then when I go to run the survey, it says there are 37,000. Then when I actually ran the survey, it seemed like the custom blocklist disappeared and 43,000 people could see it! I’ve attached images of this all below. So I stopped the survey but could someone advise on if this custom blocklist is actually working or it stops for some reason?