In which two people from different fandoms exchange a fanfiction from their respective fandoms. It can be your favorite or even a random one. Both people have to read the fanfiction and comment on it. It's usually better to select a shorter fanfiction, such as a oneshot and the stories should stay close in length to each other in order to be fair.
These can be for fun and can immerse another reader into new communities.
Bill traded his favorite fanfiction to Mandy, who did the same.
"This fanfic exchange was an awesome idea!" Penny said to Hailey. "I'm interested in this fandom now."