There are also some fanfiction communities on Tumblr. Some users post their Sollux Captor x Reader fanfics there. You can follow relevant tags like #solluxcaptorxreader to discover new stories. However, the quality might vary more compared to AO3, but it can still be a great source for some unique takes on the pairing.
Another option is to check out some Homestuck - focused fanfiction forums. They might have a dedicated section for Sollux Captor x Reader stories. These forums often have a community of fans who are really into Homestuck and its characters, so you might find some hidden gems that haven't been widely spread yet.
Chapter 433, "The Young Master Has His Own Ideas", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 443, "Did Jiang Li Steal Team F's Home?", is the clearest early answer because it turns Wenwen's situation into a concrete plot event.
Chapter 379, "Is This the Way Huaxiu Treats Its Guests?", is the clearest early answer because it turns Huaxiu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Song Man chuckled twice, evidently displeased, and then positioned...
Chapter 712, "This is definitely not reliable!", is the clearest early answer because it turns Jiang Tienshen's situation into a concrete plot event. The chapter gives readers a real answer by opening on Exactly, exactly." Wen Jiaojiao said discontentedly, her arms crossed.
Chapter 606, "Are There Crocodiles?!", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. It opens with Hearing Ji Yanbai volunteer to stay behind, everyone ceased to have...
Chapter 393, "Clearly Marked Prices, No Deception to Young or Old", is the clearest early answer because it turns Shang Shaobai's situation into a concrete plot event.
Chapter 642, "Congratulations to Qi Tianyu, Points Increased by 10!", is the clearest early answer because it turns Congratulations's situation into a concrete plot event. A useful checkpoint is the way the scene starts with We'll be the first to catch the plane, then we head straight to party!
Chapter 363, "A Cure-All for Fancy Trappings and Arrogant Tyranny", is the clearest early answer because the rescue effort creates visible on-page results. It opens with I bid 550,000!" "600,000!" "750,000!" "....." Soon, the price of the...
Chapter 562, "So You Are Not First, But Last?!", is the clearest early answer because it turns Team's situation into a concrete plot event. It opens with After they finished preparing the fish, Guo Xing and Luo Xuan got... and closes on Seeing this, the other three also began to taste it..
Chapter 667, "Hired a Private Detective?!", is the clearest early answer because it turns Shiguang's situation into a concrete plot event. It opens with Behind his dark sunglasses, Xi Yang could feel the invisible... and closes on The two previous hit shows, "Wilderness Survival 30 Days" and....