RollerCoin is a crypto mining simulation game with real crypto withdrawals, if you want to learn more about it you can read my previous post on this game : here & here.

When I’m writing this post, Rollercoin counts 965846 users and is organising a refferal contest to reach the 1 million users.
This contest called ROAD TO ONE MILLION started on June 4th and should end on June 20th or as soon as the million is reached.
the total prize offering for this consest is 7500 RLT
(RLT is the game currency & 1 RLT= 1 USDT)

The prizes of the ROAD TO ONE MILLION top 10 referrals are:
1. 1500 RLT
2. 1000 RLT
3. 600 RLT
4. 400 RLT
5. 300 RLT
6. 300 RLT
7. 300 RLT
8. 200 RLT
9. 200 RLT
10. 200 RLT

Then 50 random participants, who have at least 1 invite, will also get 50 RLT

So only joinning and inviting 1 friend you could have the chance to win 50 USD in game. It will allow you to buy a miner in order to mine passively BTC, ETH or DOGE.
If you are interested here is my link, it allows you to start with 1000 satochi (0.00001 BTC):
https://rollercoin.com/?r=klfqxc8e