I am not sure is this an appropriate question for this forum.
I am a consumer and often email a number of businesses looking for quotes and more information about products/services that I am hoping to purchase.
Often this could involve more than one email.
Usually if I pick one supplier over another I will email them out of courtesy to say that I have gone to another supplier --- if anything just so they don't waste time following up.
Is this good behaviour or closer to rude and obnoxious?