Bing makes perfect sense in en-US. Kumo never would have made it as a verb here; Kumo'ed sounds too much like comode, which is a toilet. Any other use of Kumo as a verb doesn't roll off the American tounge; Kumo'ing, Kumo it, all nails on a chalkboard.
Bing in the States often indicates something is complete and/or correct. Pretty close to "Bingo!" when an answer to a question is correct, or "Badda-Bing!", etc. Perfect sense. They chose well, I think. Given Microsoft's history of naming things it could
have been bad, real bad.
Now "Azure", I have problems with that one; where's my codeine....