This kind of corporate behavior is common. Subaru for a while offered free SCCA memberships with purchase of a WRX so you could autocross it, then you do an autocross and they try to get out of any warranty work because you autocrossed it.
Certainly tire/brake pad wear shouldn't be covered but they were more ridiculous about it than that.
Be sure you know what autocross is before you type up a big lecture about wear and tear from racing. Also I already know.