My only advice to the company that conducts a contest like this is that they must give chance to others, I mean old winners must be restricted of entering after some time. With the skill they already have, it will now be easy for them to win.
This is not fair in my opinion and it all depends on yoj how creative you are as imagination and creativity don't have any limits.The old winners have presented the art which team liked but this doesn't mean they will always win and it's open to all like last time I submitted my entry and was on winning list so should I not be allowed to enter again? The new talent needs to compete with the existing one to prove themselves and give their best which is why we have these contest as you will also have rewards from casino.So take it as motivation and be creative in your way.