„Awesome Alchemy“ counts as special week.
Special weeks are a recurring thing.
(Although I can’t remember one recurring so soon. Obviously only few played it the first time?)
As you will encounter candyland week, red ring week, double production week etc. not only once.
You can see here
that the alchemy is not really greeted with enthusiasm and many don’t play it.
Like with double material week, you will have the 2x sign over the repeatables for a week, if you want it or not. At least you can opt out of playing the alchemy.