I googled it and I could not find much beyond a brand called Orange that gives 1 year warranty on racing and this thread. Don't think any brand would harm themselves by excluding racers from their warranty, racers are some of the top ambassadors for the sport.
OK, here is one for example, Giant is a fairly well known brand, but this is from their USA terms and conditions....
5. Exclusions. THE ABOVE WARRANTY, OR ANY IMPLIED WARRANTY, DOES NOT COVER NORMAL WEAR AND TEAR. ALL WARRANTIES ARE VOID IF THE BICYCLE IS MODIFIED FROM ITS ORIGINAL CONDITION OR THE BICYCLE IS USED FOR OTHER THAN NORMAL ACTIVITIES, INCLUDING, BUT NOT LIMITED TO, FAILING TO FOLLOW THE OWNER’S MANUAL OR USING THE BICYCLE FOR COMMERCIAL ACTIVITIES OR IN
COMPETITIVE EVENTS, INCLUDING BUT NOT LIMITED TO
BICYCLE RACING, BICYCLE MOTORCROSS RACING, STUNT RIDING, RAMP JUMPING OR SIMILAR ACTIVITIES, AND TRAINING FOR SUCH ACTIVITIES OR EVENTS.
Like you said before, when I read things like this, it makes me look elsewhere for a bike. This exclusion may not get used much, but knowing my luck it would happen to me.
All besides the point really, as you are trying to get support on your frame. They should at least respond to your emails. I am guessing they responded to you fairly quickly when you made queries on purchasing.