What are me less like the "rewards" de obtained. I can start with the Munster graphics not much. For me last reward a la BF "valuable". Ie different weapons and attachments for the character. Therefore only 4 stars.
I'm going to buy any "Skins" for about 5 Euros. Possibly a Season Pass. Let's see.
How long I can not say the motivation persists. Now, after 30 hours it is definitely still present.