Contests can come and go but swap, bet, withdraw cryptocurrency with cheap fees are more important experience for users and these activities are used more regularly than joining contests and chase awards.
The added feature like swap is one of the good way to attract players. Remember, convenience is one factor that makes a player stay. Having swap in a gambling platform relieves players of the headache of moving funds to another platform just to exchange it for their desired cryptocurrency. I am grateful to Metawin for implementing or integrating a swap service into their site since this saves me money and time.