Pretty much anything on my bike has already got the name of whoever made it painted all over it so... no. Don't have to, I do put the stickers of the stuff I'm really impressed with on the back of my car though.
I they aren't paying me to put their name on my bike, screw 'em. Why would I act like they do?
I'll put the stickers from retailers or vendors that treat me well on my tool box and stand like a lot of other people have mentioned. Last night I proudly put a "webcyclery.com" sticker on my stand. This company kicks a$$ and they will get my praises and recommendations.
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