I did the exact same thing (upgrading a multi day ticket) and still never received my welcome package. Don’t know why that would matter though, but you may be right.
Just got off the phone with them. They said it has nothing to do with it. I don’t buy it. Anyway their advice (if you re interested) is to wait another 8-10 weeks and if you haven’t got it by then give them another call. Lol. I bought our Keys on 8/25. Maybe I’ll get it before it comes time to renew? It’s all so MAGICAL and WELCOMING. I told them what a mess this process is and they said they “didn’t anticipate the Magic Keys would be so popular” and it’s because they re understaffed. I told her I can understand being understaffed but I don’t understand the process and why people who bought them weeks/ months after me already received them including my sister who lives down the street. Anyway they can keep their cheap “welcome” package. I’m not wasting my time on another phone call.