Board Thread:Game Discussion/@comment-34609328-20180208213711/@comment-26829117-20180208224543

And yet there are people who have reached 100% completion without making any IAP or using any exploits. It is possible, you just need a plan. You've made a couple of mistakes in your calculations:
 * 1) You have only factored in LTS rewards but there are series completion, special events and flashback rewards too
 * 2) You haven't factored in that buying cars is the worst way to get them (Special Events, Limited Time Series and Flashbacks are the best ways followed closely by sales).
 * 3) There are upgrade sales
 * 4) You shouldn't ignore fame bonus, or agent, they are both important and make a big difference
 * 5) You can get 20 GC from watching ads each day (if you want)
 * 6) As RandyMc said, you ignored Elite status and WTTT.

I'm not saying it is easy, or that a player starting today could reach 100% completion but I recently did an experiment and found you can open up almost all series up to Legend without any real effort. I ended up with over 1200 gold and what stopped me progressing is that I ran out of R$ to buy the early legend cars. With a little more time I would have unlocked all series whilst maintaining 1000 gold in the bank. At that point I would start winning new cars and slowly winning and upgrading cars to complete series. Slowly slowly catches firemonkeys.