Somebody asked you this??
There was a thread about countries that purchase cake by the pound last year.
Here in Singapore, most local bakeries (storefront or home) charge by weight. The Singaporean accent is not close to the American accent at all- but I've met quite a few who do have an American/Canadian accent if they've gone to the international schools here (for most of their schooling) or they went to North America for school, it could have been a situation like that.
Personally, I think charging by weight isn't a good way to price at all- as it's not fair to the buyer nor the baker. It doesn't consider the time spent on the cake nor the quality of ingredients. I would never buy a cake that was sold based on weight as I think quality ingredients aren't used...they don't (I assume) bother using good butter or organic eggs etc. Not to mention that of course fondant just weighs a lot.
I have noticed that a few of the more 'modern' or update to date-cake places here, will now charge by servings- but that is not the norm- and they have to explain all of this to their customers or on their websites as I'm sure most local clients are not used to buying this way.