Two reasons were given by owners of the space: they were concerned that the use of the phrase ‘for God’s sake’ would cause widespread and serious offence and they also did not wish to take adverts relating to religion.
The BHA has reacted with astonishment that an everyday phrase should be deemed too contentious for public display.
‘It is a little tongue-in-cheek,’ BHA Chief Executive Andrew Copson commented, ‘but in the same way that saying “bless you” has no religious implication for many, “for God’s sake” is used to express urgency and not to invoke a deity. This censorship of a legitimate advert is frustrating and ridiculous: the blasphemy laws in England have been abolished but we are seeing the same principle being enforced nonetheless.’
I can't see it myself.
Maybe they are worried some employees might have problems?
Being a Humanist means trying to behave decently without expectation of rewards or punishment after you are dead. - Kurt Vonnegut