These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Game Breaker: The square that allows one to buy skill points for only $200. Combine it with the other Game Breaker, (the slot machine) and you'll become unstoppable.
The Slot Machine unlocked at level 40 is also pretty broken. If costs a very cheap $10 a spin (when you can get about $90 by clicking on a mission), getting 3 @s will give you a little exp, getting 3 $s will give you about $2000. Getting three 7s or three stars will net you a huge sum of money, enough to buy a few upgrades and the big kahuna, the *s will earn the most.