Gainz Box July 2019 Theme Spoiler + Coupon! Posted by Hello Subscription on June 18, 2019. Subscription Box Spoilers Make the first comment! Hello Subscription independently researches and reviews the best subscriptions and products. Things you buy through our links may earn us a commission. We have the theme spoilers for Gain[z] Box July 2019 subscription box! DEAL: Get $5 off your first box just use the code GZBX5 OR FITLIFE. Valid to new subscribers only. The theme is SUMMER SOLSTICE! Are you getting Gain[z] box this month?