Ok, So yesterday (Tuesday) it let me look at loads of things for free. Today, nothing. Every time it goes to the 'payment' page. 
Why?
Is it supposed to be 'all week'? Til when?
It seems that only the records linked to the hints are viewable for free.
I have two relatives (brothers) who both went to Australia, both died there, one married, the other did not (died in his 20s not long after arriving).
On my tree I have the marriage date and wife's name and both deaths. Only the events for the brother who married have been picked up as hints, so I can view those records. The death of the second brother has not been linked to a hint, so I cannot view his death record free, I can only see it on the index search. So it is not that some types of records are viewable and others are not, it is linked to a specific record.
I have another rellie who is on census records from 1841 through to 1891, I can find him on all of them (on FindMyPast records), but FindMyPast hints can only find him on 1851, 1861 and 1881, because of bad transcriptions (original enumerator's) and/or mispellings of names. So I suspect if I didn't have a sub, I could view 1851, 61 and 81 records for free but not that same person on the other censuses.
