Of course, others are more involved, but still that isn't any excuse. Usability by itself only reduces your customers frustration level. This is an excellent article and one that I almost completely agree with. It doesn't apply to all sites, but for those folks selling stuff, it is worth your time to read. A main problem with usability is that people think it is separate from marketing, writing, coding and the like.
Usability is a part of the whole.
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