Updates are rolled out gradually, so it's possible that some sites may have received the new update while others haven't yet seen it. This is done to reduce the impact if an unintentional bug is introduced in the new update. But if everything is fine, all sites will be able to update the plugin within 1 week after the release.
The plugin you have downloaded via Envato/CodeCanyon isn't always the latest version for various reasons. Minor updates are mainly only distributed via the build-in WordPress auto-updater. Major releases will of course always be available on CodeCanyon as well at least within two weeks after the release.