Crepes do not cost 15 euros... at the max 5 euros. But you misread the post; he didn't claim the guy made a million euros in a year, he just claimed 1 million, so it could have been spread over 10 years.
"At my highest peak" is meaningless to apply to a running total. It must be some period of time. A year would be implied, given the context of the conversation.
