According to Truevisions, BeIn Sports 1 & 2 are available free to Platinum subscribers. Subscribers to Premier League add-on receive it free from August 4th to August 31st.
"beIN add-on package, normal price 199 baht per month, special 119 baht per month
TrueVisions Platinum members get free beIN add-on packages! Up to 3 seasons from 4 August 2021 - 31 July 2024
True Visions member who bought the True Premier Football HD add-on package Watch free beIN add-on packages from 4 - 31 August 2021.
Can follow and watch top football leagues around the world. and European Football Cups via beIN Sport1 and beIN Sport2 True Visions Channels 604 and 605 until August 31, 2021, starting from September 2021 onwards, can be viewed on beIN Sport1, Channel 607 and beIN Sport2, Channel 608."
https://truevisions.co.th/post/8c2ee750-f454-4233-ab6a-481af9b271c9