From a quick view in, everyone says google is better than Bing, but this is a lot more complex. If you have a big budget, and can compete with the all the sheep in the heard and stand out, google makes sense. I will guess for a lot of smaller hosting, developers, small IT guys, they just cant so then it becomes an ROI case study, trials, etc ... Bing and alternative more cost effective approaches come into play. at that time maybe BING comes in and returns better ROI. 1 reason for this happening is that typical buyers wiill google it first, research it on google, then once they are ready will double check and at that time deploy some BING searches. Well those searches are now made by ready buyers.