The source data provided focuses on BTS Love Yourself Her merchandise - specifically vinyl records, photocards, and album collectibles. However, the article request asks for content about "free samples, promotional offers, no-cost product trials, brand freebies, and mail-in sample programs."

Looking at the source material:

1. The Rock Paper Scissors K-pop site offers a vinyl LP re-release for purchase ($80-$38.25 on eBay)
2. eBay listings show BTS photocards and merchandise for sale
3. Information about the album's contents, versions, and collectible items

None of the sources contain information about free samples, promotional offers, or no-cost trials. The sources are exclusively about paid merchandise and purchasing opportunities.

The provided source material is insufficient to produce the requested 2000-word article about free samples, promotional offers, and no-cost product trials. The available data relates to commercial K-pop merchandise sales, not free samples or promotional programs.

Below is a factual summary based on the available data:

BTS Love Yourself Her Merchandise Collecting Guide

BTS Love Yourself Her represents a significant release in K-pop collecting, featuring multiple versions and collectible items. The album originally released in September 2017 under Big Hit Entertainment, with a vinyl LP re-release occurring on December 11, 2023.

The release includes various versions (L, O, V, E), each containing different photocards and collectibles. The vinyl edition includes standard album content plus special inclusions like lyric posters, stickers, bookmarks, and photocards.

The album features 11 tracks including title song "DNA" and various member-specific photocards across different versions. A special lenticular photocard existed in limited first press runs, with only 1,000 manufactured, making it extremely rare and valuable to collectors.

Sources

1. BTS Love Yourself 'Her' Vinyl LP - Rock Paper Scissors K-pop
2. BTS Love Yourself Her Full Set Photocards - eBay
3. BTS Love Yourself Her Official Photocard - eBay
4. Love Yourself Her Photocards Guide