Actually I do have a huge lot of competition, Free and amazing packs like bbundle, but ever since more packs came out i started expanding with things like progressive mythicmob infested strongholds. And quests for in towns and cities in the planning
I think those and the mentality to do better then i can find over the web are my strongest points when it comes to it.
Well motivation by money.. not really. Its more then that. At first the idea to put a price on the package ( no donation ) is because i did not wanted yo serve the mass, this gives me the chance to focuss on the smaller group of customer wishes, customers which complimented the map by paying for it generally apriciate it more and with the income i can do all sorts of things like #1 keeping the servers up, paying denizen developers to create a tag for tc ( i donated for that haha )
Much like doing things you did aswell, buying testmap to give it away for free
P.S. i wanted to give my map away for free, then mysource contacted me and explained me: I did that once and you wouldnt believe how many mails i got with your map sucks, fix this and that!!!
Andd i didnt wanted that to happen