This is not Reddit's first foray into NFTs. The platform launched four 1-of-1 "CryptoSnoo" NFTs in June 2021, which allow the four holders to display the NFTs on their profile. The "Collectible Avatars" appear to be an attempt to open this same functionality to a broader group of Redditors, while simultaneously appearing to try to sidestep the more negative sentiment around NFTs that has developed since their last project.
Reddit announced that they will be selling "Collectible Avatars", artist variations on the Reddit "Snoo" figure that users can then customize. Amusingly, Reddit's announcement carefully dodges describing them as NFTs, instead writing that "Collectible Avatars are backed by blockchain technology". Despite this, the avatars are indeed NFTs, created on the Polygon blockchain, though users will be able to buy them with plain ol' fiat.