If there's seem to be a familiar artwork from someone, they can spot it on and tell that it's familiar to them and have seen it somewhere. But twitter or any platform, we will always wish the best on these art contests of duelbits and as well as the participants.
I know that twitter is a marketing that is widely used on every platform to make it easier and also all other info and announcements now they usually do a lot on twitter and that's true but I think this needs to be balanced so that all forum and twitter users can enjoy the results the best art contest with them is conducted by the participants.