Adwords and Bingads cover almost all of the paid search market share so I wouldnt bother with expanding beyond them until your ad campaigns are at a point where you just cant grow them anymore. Google gets a lot more volume than Bing so you’ll find that with Adwords you can spend a lot more. However, if you’re on a smaller budget you may find that Bingads could work just as well for you or in some cases it may work better for you than Adwords. In my experience, the potential for spend on Bingads is about 15% of the potential for spend on Adwords. For example, if you are spending $100/day on Bingads then you could probably spend $700 on Adwords, thereby making that much more money on your ad spend using Adwords. However, in some cases Adwords may be more competitive than Bingads and you may find that your profit margin is better with Bingads than with Adwords. Also, Bingads is not as strict as Adwords is so you may also find that you have less ad disapprovals with Bingads than with Adwords. Affiliate marketing landing pages will often fall under Adwords’ definition of a “bridge page†and Adwords may disapprove your ad for that reason and ultimately they could disable your account while Bingads has a looser definition of that term, and your chances of surviving are better. Go ahead and give both of them a shot. Way to go with taking the initiative on creating a business, good luck!