We kindly ask miners to post USDT as collateral because there aren’t enough test CCN in circulation to stake since the testnet mining recently started. Dome-A 2.0 is launching in Feb 2022, where miners will be able to stake test CCN.
The collateral (in terms of the equivalent value in CCN tokens) will be returned in full six months after Dome-A 1.1 starts, according to the price of CCN tokens in the secondary market.
Miners need to stake 1 USDT for every 25,000 metapower. The collateral is capped by 100,000 USDT in Dome-A 1.1. One miner can provide up to 2.5 billion metapower.