Yes, something like that.
You will need to buy from them annually so that your record shows that you are with them yearly. if you skipped a year, you have to start from scratch.
If you are able to bundle with them, go for the bundle deal immediately instead of buying it separately. Talk to an AD to know whether Cartier can bundle SS DJ together although I think SS DJ should be easier unless you are going after the rarer SS DJ.
check it from grey whether your SS DJ is cheaper without bundle so that we can save some bucks here..