I'm sure most by know but there are two awesome communities on D3 called MultiRifting and Rift it Forward (off shoot of MR) where you can easily get all the free rifts, gold, xp, shards, plus crafting mats (Souls, items for breath) and leg's by exploiting the rift system. Here's how it works:
1. Join MultiRifting and Rift it Forward communites in D3 (in game).
2. Join the communites chat channels.
3. If hosting start a private game and open a rift, get to the guarding and then announce in the community chat that T1 Guardian is up and you need reopen (or something similar). Try to host games as much as possible as there will always be more leechers.
4. If Leaching just right click and request invite for anyone that posts something similar to 3, you need to bw quick.
5. Help kill guardian and profit.
6. Make sure rift is reopened before leaving. I try to open a rift every 3-5 games, don't be a leaching Richard and Rift it Forward!
This is exploiting the rift system I feel but feel free to move to guides if in wrong place and sorry if repost.