I read the message at extj.com too, but I'm thinking that the new articles will rather deal with the fact that minor parts of birthday celebrations are ok.
Frosting by itself is ok.
burning candles and blowing them out is ok.
spongy cake is ok as long as it's twinky shaped.
large portion spongy cake from round, rectangle or square pans not ok especially if cut in wedges.
It's ok to write the word Happy but that's it.
Whole birthday cake partaking is still a matter of conscience as it's always been but means the person consuming it is publicly declaring their disassociation from membership in the Christian Congregation of Jehovah's Witnesses in Bulgaria.