Way back when we had our first USB-programmable modded controller, customers griped about having to wait for us to release updated drivers for the controller. So, we created the macro controller and included a full GUI timeline editor, so customers don't have to wait for us - they can build their own macros at any time. The macro library is just a bonus for customers to share with each other, but you can always share here too
Not all macros are approved, in fact about 90% of macros are rejected due to lack of a description of what the macro does.