LATAM sent out an email late last week about upcoming changes to its in-flight product for domestic flights within the markets it serves, although the airline states that these may be implemented on regional flights also.
Complimentary snacks and beverages are gone and replaced by Buy-On-Board. Passengers must pay for seat selection and baggage. The airline claims that it will lower the cost of tickets by up to 20% (doubt that this would happen). LATAM will award miles (or actually kilometers based on the ticket price).