I think this may be the same one I did and I was paid £3.00 as you said. You had to do it like 4 times before a cut off date, sugesting if you seen the ad or not and where you were at the time. As long as you did what it said, you should be eligible for payment, also just cashed out instantly last night on survey funds.
So as a newbie here I'm still trying to get my head round it all & which is the way to channel my time. I've signed up to Prolific & Resondent thanks to @Jon
I've earned a few 3.00 on Prolific so far & waiting on surveys to come back from Respondent that I've applied for, so fingers crossed.
I have a few items listed on Ebay which I hope I will put to my 1st try at MB, scares me to be honest.