This function determines if plugin promotions show in cPanel.
uapi --output=jsonpretty \ --user=username \ Plugins \ can_show_promotions
{- "apiversion": 3,
- "func": "can_show_promotions",
- "module": "Plugins",
- "result": {- "data": {- "can_show_promotions": 1
 },
- "errors": null,
- "messages": null,
- "metadata": { },
- "status": 1,
- "warnings": null
 }
}