Another important element is the tracking and monitoring of your databases and their relevant data points, along with how these are being used in the campaign as a whole. It is, again, a lot easier to track and properly monitor your data when there is less of it, so this is something you may want to monopolize upon too. You need to track not only leads and conversions, but also monitor your campaigns broadly, so this is so much simpler with smaller databases and data sets.
As you can see, in general, it is actually easier to run marketing campaigns with a small database size. You just need to make sure you stick to it, so you can get the best possible results every time. This is the main way to ensure you get what you need out of the campaign