Hey! :)
I think I have just released an update, which will answer your question. When you now complete your daily missions, you will earn "Llama Marks" which you can then spend on missed promo cards. :)
They will be available by the end of the month. As for the raid cards (like Valentine's raid), I'm currently working on some sort of "singleplayer raids" :)
So don't worry, everything you've missed will become available in the future! And I know the "Llama Mark" Shop might already feel like a huge commitment, so I'm also thinking about making them event mission rewards. If everything goes as planned, the next event will start later this week.