Hi! As of now, PureOS 10 (Amber) is frozen, all future uploads to that suite will go to the respective "*-updates" pocket. This means that PureOS 11 (Byzantium) is now open for business! All uploads to "landing" will migrate to that suite, and so do all uploads to the "byzantium" suite. So, if you want to upload to the next PureOS development release, just put "byzantium" as suite name into your sources.list Please let me know if you experience any issues!
Happy hacking! Matthias