Random steam key bundle or game key bundles in general is always fun because you never know what you are going to get in them. In some of them you can get pretty good AAA games but sometimes you can get games that will leave you scratching your head because you never heard of it.
If you happen to buy more than one bundle, you can sometimes get duplicates, often times the seller will allow you to change in the ones you already have but I rather just give them to friends and or just give them away. Key bundles are the perfect giveaway opportunity to give back to your stream community and viewers.
You can set up a random drawing and make it so they can enter the giveaway. Sites like Wizebot, Nightbot and a few other bots that you connect to your stream has a giveaway option you can use or you can just figure out what is the best for you.
Steam bundles are a great gift to give as a present because they won’t know what is in them until they open it and it’s always a surprise!
Get your bundle from fanatical! I always use fanatical because I get the most keys for my money and I love how random they are but sometimes, bundles do give the same keys and I just give them to friends or post them on my steam activity and twitter for others to grab.
Get a bundle from kinguin – I sometimes buy them here also just depends which bundles and where looks good to me.
Gamivo does not charge a bad price for keys either! Check them out also!