Possible Clues:

• Letters before a summary
• Inits. before a summary
• Acronym after a long online paragraph
• "I lost interest" acronym spelled out by the starts of four answers in this puzzle
• 'I know this email is super detailed, but here's the important stuff:'
• 'Sorry, but I'm skipping your novella of an article,' in Internet shorthand
• Internet shorthand before summing up a wordy post
• Initials before a summary
• Acronym after a long paragraph
• Texter's ''Couldn't finish this article''