Anyone who is likely to be using Filecoin to store and use real data can verify their Filecoin address to receive DataCap. DataCap can be spent in storage deals with miners.
A Notary is someone who is charged with allocating the amount of DataCap an address is likely to require, and granting that address a DataCap up to that amount. This app is one example of a Notary. You can find other Notaries (who will support larger DataCap allocations) here.
Data stored by verified addresses makes Filecoin storage miners eligible for more block rewards. This drives miners to compete for verified deals by improving quality of service. You can read more about this mechanism in the Filecoin Econ Whitepaper or in the original FIP.
Once you’ve exhausted your DataCap, you can come back here and follow the same steps. This process can only be repeated at most once per 30 days.
Simply login with GitHub and enter your Filecoin address. We’ll grant that address DataCap.
As long as your GitHub account is at least 180 days old, you will receive at least 64GiB of DataCap. Any amount above 64GiB of DataCap allocation granted depends on your GitHub account age and activity and how many verified deals your Filecoin Address has made on chain.
There is a list of miners offering special pricing for clients storing verified deals here.
Clients with DataCap have increased power on the network. You can find a list of suggestions on how to best make use of that DataCap here.