I don't think they would (and should) make the criteria public, or else people would intentionally use certain keywords and/or tags (for a higher chance) to trigger automatic LOLZ bot curation. 🤓 Maybe there is also a human curator that sometimes operates the LOLZ curation accounts and selects comments (and posts) to upvote. 😏
Anyway, looks like your comment which is already 4 days old didn't get any LOLZ curation (which is most probably because you didn't use the LOLZ tip command). 😅 !LUV !CTP