As said before, the payment and buy methods could be stored in a junk dimension. A junk dimension can be loaded using a Combination L/U step. As all the fields in a junk dimension are part of the primary key, you don't need an extra Update step to load it. The following image shows you how to load this sample dimension:
Loading a Junk dimension
When you use a Combination L/U step, the step returns the generated key to you. So, the use of the step here to load and get the key at the same time fits perfectly.
If the dimension had been loaded previously, instead of a Combination L/U step, you ...
