Thanks for 4 years of Thanks for 4 years! is the fourth BFDI short which celebrates the 8th anniversary of BFDI, as well as the 4th anniversary of Thanks for 4 years! and thanks the fans for watching the show. Though it was intended to be released on the 2nd, the video was uploaded to YouTube on January 3, 2018. In it, Match thanks the viewers for supporting Battle for Dream Island for eight years.
- Everyone is styled in a BFDI/BFDIA/IDFB style except 8-Ball, Four, and Match (before speaking). 8-Ball and Match are styled similarly to how they looked in the IDFB intro, while Four’s appearance matches his look in BFB.
- Although Match uses the assets that are used now, sometimes her eyes change into the eye assets used in pre-Insectophobe's Nightmare, symbolizing how much the animation has improved.
- This is one of Yellow Cary's only appearances in a BFDI video.
- This is the first Jacknjellify video to be uploaded to YouTube in the year 2018.
- This is the first BFDI short and BFDI related video uploaded in 2018.
- The only BFB newbie to appear in this video is 8-Ball. He is impaled on the 8th candle, which pops out of the cake when the text changes.
- Match said "Four" or a word that is similar to "Four" 21 times.
- This is the first video animated by Cary since Welcome Back.
- The video description explicitly says that the video is non-canon, meaning that the events which took place in the short did not actually happen in the BFDI timeline.
- The old character assets and bodies were used in this short.
- Four has sharp teeth, which he does not have in BFB.
- This is the first BFDI short to have Four in it.
- Every episode thumbnail in the video was from an episode where Match was either up for elimination or eliminated already.
- This episode may be called "Thanks for 4 years of Thanks for 4 years" instead of
"Thanks for 8 years" due to a reference to Four.
- This is the second video made for BFDI’s birthday, the first being “Thanks for 4 years!, and the third being “Happy Birthday, Battle for BFDI!”
- There was a subtitle saying that "BFB 13 will come out in 2019 (true)", but the subtitles are removed.