I got 465 out of 500 points in Forza 2. 895 out of 1,000 points in Forza 3. 1,2338 out of 2,000 points in Forza 4 and 1,226 out of 2,000 in Forza Horizion. I think the only way to reach the top tier is if you actually buy some of the DLC for Horizion and Forza 4. I'm pretty much contend with being tier 4 I'm sure I will get something decent again next month. I'm guessing I might have gotten some more cash then you did. Also you can earn immediate rewards by increasing your tier too bad I only got one more tier to go. Anyway the Skyline for Forza 4 came in real handy since it helped me unlock the Unicorn Hunter achievement.