Bad News first: All those links are not valid anymore
Good News: XDN has a new developer (team?) and website https://digitalnote.biz
Please use ONLY the NEW WALLET (download from the website above.)
Old wallets will NOT work / sync anymore, the new ones are fast syncing.
You may even speed up the process by using the google drive data they provide. (That is for WINDOWS users only !)
You can earn DigitalNotes by mining as a reward for securing the XDN network using the power of only your CPU. Another way to earn DigitalNotes is via staking. Any XDN user can deposit his DigitalNotes to earn staking rewards. XDN's unique staking methodology is non inflationary and is paid to holders depending on the "locking" period chosen.
NEW mining pools are also available now.