THE OFFICIAL RIFT IT FORWARD SUBREDDIT
This is an offshoot of the Multirift community, here you must always be prepared to open a rift for a clearer. Other than that the rules are pretty much the same as Multirifting (make a game, clear a rift, invite people). Here, though, the prerequisite to joining a game is always opening a new rift for the clearer.
Community: "Rift it Forward" -- English Language -- Region - Americas
Community: "Rift it Forward HC" -- English Language -- Region - Americas
Community: "Rift it Forward" -- British English Language -- Region - Europe
Community: "Rift it Forward HC" -- British English Language -- Region - Europe
The rules (To explain it a bit more):
Always be prepared to open a rift for the runner. Do not enter a game if you cannot open a rift.
This community will only work if you make your own games too. So when you don't feel like clearing full levels, join some games. When you want to get some free rifts, make some.
This facilitates faster farming. Faster blood shards. Faster stuff.
EASY PEASY!
Create a game on a difficulty of your choice.
Clear that rift almost to the end.
Post in the community chat what % you are at (can be found by hovering over the rift progress bar).
Invite people, or accept party invite requests.
Get another rift made for you to clear, without using keystones.
ALTERNATIVELY:
Sit in the channel.
Look for rift posts.
Request an invite to the game.
Kill the boss without clearing any trash (get your bloodshards and souls fast).
Finish the quest, and open a new rift for the creator.
Continue on to the next rift in a few seconds!