ARCH4NG3L said in game they had previously got the credit pack with the sword in the past
I had said after gamigo acquired them, they may have introduced the '+20% bonus credit for first time buyers' promotion for everyone
and quoted (the first-time buyer packs are excluded from this promotion). for this 40% off promotion
someone else had agreed the first time buyer promotion was pushed onto everyone
So you may not see a 40% off offer until you buy their credit offers at full price with bonus credit first.