How many times have you heard a radio commercial that directs people to a website? And how many of those times has the actual site been something different than what you heard? English is a funny language - we have these things called homophones, and they can make it difficult. Sometimes you can figure it out from the context (Assuming you know how to spell), but I’ve heard commercials, although of course I can’t think of an example, where it’s impossible.
Part of this is due to the fact that sometimes the company name isn’t a real word. If you’ve invented the spelling of the company name, I’m not necessarily going to be able to spell it if you say it.
I suppose it’s not that big a deal. It’s just dumb.