Hi Ruskie,
If you go to (My Account) at the top of the page it should show you how many credits you have left for that account.
I followed the link in Nick's post to claim 50 free credits yesterday - signing in with my FindMyPast account, however I don't seem to had these credits added to my existing ones.
Today I thought I would sign up with another of my email addresses, and claim the 50 free credits.
This is the message I get......
Unfortunately, you are not eligible for this offer. This is either because the offer code has expired, or because you, or someone who uses your computer or shares your email account, has already activated this particular offer code.
Don't know why they could not give their loyal customers 50 credits on their balance.
Think I will give up trying.

Sarra