After Cardano SL test net resets in late March 2017, network will operate in “bootstrap mode” for the initial 90 days after that. As people who purchased Ada redeem their coins, the stake will automatically get delegated to a pool of trusted nodes that will maintain the network. During this time no block rewards will be issued — we will maintain the network pro bono. This is required because in order for the protocol to function properly, some of the stakeholders who jointly posses majority of stake have to be online, which in reality won’t be the case during the first months of network operation.
The Bootstrap era will lead to the Reward era when we issue updates to the protocol and provide the major stakeholders with convenient options to run their nodes on personal servers in the cloud.