12% reward of referral program is quite attractive. Far as I know, there are no other companies holding such high proportion of it.
Eobot: You can earn 1% for every user that you refer who uses the software/miner and cloud
Minerbid: There's a affiliate program including six levels in total. The more users you refer, the higher level you reach. Still offer 1% of income from affiliate. Minerbid hasn't worked for 2 days. Tell me why!!!
Cloud Hashing : Earn 5% of the hashing power anyone you refer purchases through the website using a simple link.
CEX.io: 3% from the referred user’s GH/s balance.
And now, ZeusHash offer 12% reward. Though it only lasts for a week, when it expires, you still can earn at least 6% free hash from your referred users.
I've to admit that these firms are fond of affiliation. They need to attract more and more customers to compete with each other.
https://zeushash.com/refer/1iw4p2
Eobot: You can earn 1% for every user that you refer who uses the software/miner and cloud
Minerbid: There's a affiliate program including six levels in total. The more users you refer, the higher level you reach. Still offer 1% of income from affiliate. Minerbid hasn't worked for 2 days. Tell me why!!!
Cloud Hashing : Earn 5% of the hashing power anyone you refer purchases through the website using a simple link.
CEX.io: 3% from the referred user’s GH/s balance.
And now, ZeusHash offer 12% reward. Though it only lasts for a week, when it expires, you still can earn at least 6% free hash from your referred users.
I've to admit that these firms are fond of affiliation. They need to attract more and more customers to compete with each other.
https://zeushash.com/refer/1iw4p2
the only difference is that at eobot you can start mining with 1 dogecoin for example.
i have 56 referrals at eobot, some of them have near 200 gh/s but they started with 0,1 ghs heheh .
the main problem is the minimum amount to hire anything at zeus hash.
More, I was too happy to believe this case!! Now I am still excited!LOL... 
