If you server is dead and someone is trying to put effort into playing alts to get stronger while you are not then I don't see anything wrong here. Remember you can attack his alt too (I attack other people alts all the time), you just have to wait for it (3 hours). I have my own way to watch the town while plundering, so yea no SS can escape me except it level is too low (15lv gap). You just need to research how the system work, find you way to work around it. Not that hard tho.
You want "ez" coupon? Then play alts.
You don't have time because of school, job, family, outside activity, or a life? Pay.
If you don't have money and are lazy to play extra accounts but still want to be the very best? Sorry this game and Eastern games in general are not for you. Just quit, go play league of legend or dota 2. That's better.
It's simple and fair.
And do you know? There will be a lot of cross server feature come in the future. Which mean a player will have to battle against other players from different servers. So if your server is * hard to plunder and barely have anyone can get 150 cp/day then your server is pretty much fked when it come to cross servers pvp because they can't even collect their resources.