Yes, you can activate multiple promo codes triggered by general transfers at the same time, however, promo codes triggered by first transfers cannot be used with additional promo codes.
When using more than one promo code in the same time period, each code will be activated using the FIFO (first in first out) method. If you have already entered the promo codes in your Celsius app, you can not choose which one to activate first.
For example, if the first promo code entered has a $200 transfer trigger, and the second promo code you entered has a $100 transfer trigger, you will need to transfer $200 in order to activate the first promo code, and then another $100 in order to activate the second promo code (a one-time $300 transfer will activate both codes).
Please keep in mind that if you have two promo codes with the $200 general transfer trigger in pending status, you cannot activate both of them with one $200 transfer, your transfers should be at least $400 in total to successfully activate both promo codes.
Important note: You can not use the same promo code more than once.