If you sail the high seas for your anime, you might have noticed several shows available for viewing already that haven’t actually aired yet, including the first two episodes of Konosuba. The shows have been coming out over the past week or so, but I hadn’t seen any actual news articles written up to share until now.
I’m not sure what difference watermarks would make.
Everyone pretty much believes the episodes were leaked from CR’s preview shows at Sakura-Con in Seattle.