public function is_key_valid() {
			// @todo remove transient in a major feature release where we release all plugins.
			$status = get_transient( $this->pue_key_status_transient_name );

			if ( empty( $status ) ) {
				$status = get_option( $this->pue_key_status_option_name, 'invalid' );
			}

			return 'valid' === $status;
		}