The Hourly Damage Variances will affect predators in Explore. Depending on the number and the symbol in front of the number, it will either subtract or add damage points to that predator.

For premium, your familiars and alliance will stay on your account. however, they will be "disabled", so to speak. You can't accept members to your alliance/edit it/etc., and you can't use your Familiars.

Hope this helps!