Help with humble bundle keys

I need help. I have a ton of old humble bundles. Recently, I went through them and grabbed all of the unused keys, and tried adding them to my account. If I already had the product, I'd then add the key to a document of keys. I've been checking them with steam to get the product they're for, and then posting them here. Does checking the keys this way use them up? I have about 100 keys, and I'd hate to have wasted them all. I appreciate your responses.