You can't use Surf Shark to seed
This is why I use these https://airvpn.org/?referred_by=201634
They do cost a bit more but you get so much more control plus the old saying you get what you pay for (these offer discounts when its special times of the year like halloween etc)
The other thing Surf Shark sounds good on paper but simple things like unlimited connections and constant pushing deals this just shows I wouldn't trust them what so ever its not sustainable