vertiser_best_practices_email": "control", "copytune_pin_on_another_board_push_v4": "variant_9", "web_margins_on_flashlightgrid": "enabled_with_adjusted_margins", "copytune_unauth_value_prop_bottom_banner": "variant_0", "pixie_param_tuning_v1": "control", "streaming_header_unauth": "control", "search_pin_fresh_manas_exp": "enabled_old_model", "web_business_promote_on_closeup": "control", "web_low_frequency_landing_page_upsell": "control", "sterling_bidded_cpm": "enabled", "blender_ipfy_variety_penalty": "co