This is nothing new, it was happening in 1871:
'I should like to buy an egg, please,' she said timidly. 'How do you sell them?'
'Fivepence farthing for one - Twopence for two,' the Sheep replied.
'Then two are cheaper than one?' Alice said in a surprised tone, taking out her purse.
'Only you must eat them both, if you buy two,' said the Sheep.
'Then I'll have one, please,' said Alice, as she put the money down on the counter. For she thought to herself, 'They mightn't be at all nice, you know.'
