The game is made so it rewards players who put lots of time into it ( OR pay to get cards for the impatient). Being a veteran MMO player (ex hardcore raider in a raiding guild) i'm used to earning rewards slowly. I enjoy getting to the top slowly, working my way up while getting more play experience. I'm playing almost 2 months now and still I haven't bought a single credit yet and only have around 20% of the collection and only 1 Cr card and yet i bought packs
in shop worth close to 160 credits by now just by playing regularly.
You on the other hand seem a bit impatient and want it all NOW seing as your account is barely 1 week old and you allready have 41% of the collection and are trading Cr cards . Of course no reward in the world will seem good enough for you if you if you bought yourself multiple tenthousands of clintz worth of cards in a matter of days.
Urban Rivals is a slow game. It's designed to reward you for playing alot wich also gets you valuable expetience. That's why there's tournaments every other hour instead of 1-2 big tournament per day. Play alot, attend as many as you can per day and you'll get lots of clints and credits.
Also , you can buy all the cards in the world if you lack the experience long time elite players have you'll allways achieve low ranks. You can buy all the cards in the world if you lack the experience elite players have. You won't reach top 10 even if you have the exactly same deck, you just can't learn all