Ripple mining is restricted to their owner ,Lets talk about Ripple protocol
Ripple is a payment protocol developed by the Ripple Labs and formerly named as opencoin in 2012.Ripple mining is restricted because Ripple works on nodes and is secured by the developer of Ripple rather than the working of the Bitcoin. Ripple was created by Ryan Fugger after perceiving idea of development of payment protocol or digital currency in 2004 while working in Local Exchange trading system in Vancouver.
Ripple runs on ripple protocol (RTXP) which was produced by Ryan Fogger. In 2013 after the ripple was completed and launched a website ripplepay.com , its time for angel funding round which was held two times in 2013.This fund round was participated by Accenture Ventures, SCB Digital Ventures, the venture arm of Siam Commercial Bank and Santander Innoventures.
Ripple’s peer-to-peer node program is open source and every developer can contribute to them.There were more coins introduced on method of Ripple as it is cost efficient program to users.
Ripple received a $700k money penalty from U.S. Treasury’s Financial Crimes Enforcement Network for willful violation of Bank secrecy Act and running payment business without any consideration and license.
Ripple mining Alternative may be Bitcoin Mining
Ripple was the project to introduce a digital cash which was started earlier than Bitcoin was introduced by Satoshi Nakamoto in 2009. Ripple protocol enables user to send money directly or instantly by charging fees and some time to transfer virtual currency XRP. Soon Ripple had rose over 200% in 2014 and acquired a position in TOP 10 Cryptocurrency in the world.
If Ripple would work on Blockchain technology then Ripple mining would be very imperious and best to mine and racy in competition of mining Cryptocurrency. Usually mining cryptocurrency is to rabble a currency ,Currently Big Coins such as Bitcoins and Ethereum are 90%,soon mining of these coins will come to an end this querulous task.