Yep, endorsees are so powerful. When I was younger I always wanted a richie sambora strat to get the bonjovi sound . I never had the money but I'm glad I didn't buy now. When I seen bon jovi live they rarely used strats!
I also have a prs tremonti se, I bought it because I liked the look of it and also because if tremonti was willing to put his name on it, the it must be good. It's actually not a bad guitar but I never did get around to setting it up properly.
That is just 2 personal examples of how endorsees have affected what I buy. My current fav guitar is a tobacco burst strat which I love cause stevie Ray had one, except his was much better and more beat up!