Get Paid to Write Letters?

All of a sudden all over TikTok and FaceBook I see these people pushing a paid course for "handwriting letters to companies" and getting paid $5.00 per letter. Does anyone know about this? Is it a scam? Do you actually make your money by signing others up or by the letter writing itself? Has anyone actually done it? My big question, is why would a company pay you to write them a letter? Info please!