How can we maximize the use of design test and inbox test we only have 15 per month and we are currently not using it. Any best practice or tips on how to make the most of it?
We use these features as well. My suggestion would be to test the templates you have to get an idea for how they render and place in the inbox. Once you critique those and have them placing well, you should be fairly safe to use those to create new emails. This will allow you to continue to test a portion monthly but knowing that the templates you are building off of are done properly.