I found that each search brought up information on how many credits it would cost and how to subscibe or top up. I ignored that and clicked search/view etc and it continued on right through to the actual image. So, yes, it does keep askinmg you to subscribe or pay to view but it stil goes through for free.
Once again I didn't get very much, but maybe I'm searching wrong. However, on the 1911 census all my search enquiries comes back with 0 results, yet when the period was over the same queries brought up an index but needed payment to view. I still can't understand this. I've seen the above comments where many of you have got results during the free period.
Garth