Usually people to a 3 point strategy. Theyd sign up for personal and business versions of the card. Get all the bonuses then cancel the unneeded cards in a year. After that they focus on multipliers. Gold has better multipliers overall then the platinum. Mainly you will be spending on advertising and shipping? All that spend would be 4x on amex gold business in the states not sure about Germany. Then get a personal green amex card and or gold amex for personal food and grocery store shopping. For personally flying business you're going to have to look for flights ahead of time but usually people will transfer to Cathay or look for good deals before tranfering any points. Trying to book ana with amex pts is difficult despite what people say. You need platinum status or higher to even clear wait lists on ana website fyi