For me, people rhyming it with 'own' is like when people pronounce 'book' in the same way as 'tooth'. It seems wrong and it elongates the word too much for my liking.
I don't like them and don't buy them so never say the word. I reckon the last time I said it would have been 10 years ago and that was probably only to have this debate.
I say scone like cone But I read somewhere that queen says it the other way. I don't really think it matters; so I'll have mine with clotted cream Thanks!!
Usually when a vowel is followed by constant then again by a vowel the initial vowel is pronounced as the capital of it. Therefore I don't pronounce it as s-c-o-n but s-c-oh-n