The best bitcoin Miner and cryptocurrency mining platform in the world is as follows.
You can mining on a platform of your choice. All legal.
(When accessing the sites, you have a chance to earn more bitcoins when you log in by searching as follows.)
All Customers : 18745
Total Mining : 172.4740 BTC
Now Online Users : 2381
Free GPU Miner
Free GPU Miner is a very good bitcoin mining site where you can do gpu card mining for free by renting a gpu card with your earnings on the system.