I'm just guessing here, the offers are tailored for certain progression levels but there isn't an offer for every different progression level. The in game mail is too lazy to indicate the current offer is only tailored for x progression levels.
4th of July offers are "tuned" to our story progression level. Cyber weekend offers are "tuned" to our story progression level. The Gwenpool baubble offers were "tuned" to our story progression level. But for some reason, these offers couldn't be. Make it make sense.