The only reason you got bored of the game is because you THOUGHT you were awesome at it and decided that the artificially low set free credits made you think you had achieved something you had not. The free credits should have inspired you to see if you could accomplish the bigger goals in the game that mattered.. Do or Die plus Jericho.
If you had all the free credits that was the perfect time to work on your skills and see if you could master IM for a lot cheaper than most get to.