Texts are only for members who ask for them. In the E4C app, open My rewards, find Text messages, tick the box and tap Turn on texts. The box is never ticked for you. The wording you agree to is:
“Yes, text me E4C Shop Alerts from Elite 4 Collectibles at the mobile number on my account: shop closures and special hours, and updates about my visits and sell or trade offers. Message frequency varies. Message and data rates may apply. Reply STOP to cancel, HELP for help. Agreeing isn’t required to buy anything.”
Agreeing to texts isn’t required to buy anything, sell or trade, or be a member.