E-mail free spins were re-started in November, and they come regularly like before problems started(at least for now).
I just checked my email inbox.
I have received the promotional emails containing free WOF spins since January 13 regularly. I have those emails before that too, but not regularly.
For example, I didn't receive amy email from January 9 to January 12 and from December 13 to January 3.
I just re checked my mail folder and you are right, the mails are not 100% regular, I had pause in mails for a few days but didn't noticed that pause before. It seems that the service is still not very reliable.