I'm sure the dev must've started this project as a little hobby to track his packages and decided to open it to the public. What he thought would be a couple of users has turned into a massive amount of people, judging by his "Limited support" banner on the app. Now, instead of people being happy about having an app to sync their deliveries, he's flooded with requests to include ever more obscure delivery companies in the most godforsaken places, with languages he may have never even heard of! So poor dev, I feel your plight.
Don't worry, for I am here with words of encouragement! I just saw this sea of requests upon requests and wanted to remind you that, in general, we're pretty happy with it. I am a proud Pro user, delighted with the app, and I appreciate the effort you put into it, most of it going unnoticed. So to thee, I salute! And I wish you Godspeed in your neverending quest to include all delivery companies worldwide!
Have a good one. :)