If you just joined a alliance that has level 20 sanctuaries you need to read this!
Every time a player feeds, interacts or plays with the dinosaurs the sanctuaries grow. A high level dinosaur gives more points for faster growth. If a dinosaur also has a lot of boost added it gives even more points to the sanctuaries so they grow faster.
To be able to get a sanctuary to level 20 requires a lot of players, more then there is in one alliance. That's why it's called Co-Op. Some shared sanctuaries have maybe 6 alliances that have access to them. Sakura Co-Op has 27 alliances (1250 players) connected to each level 20 sanctuary. This means that each of the 27 alliances has less than one slot to put a "Stay connected dino in every 48h" If an alliance fails to put a dino in 24 h after their dino returned the alliance will lose the sanctuary. This is why no-one is allowed to place dinos in Co-Op sanctuaries. If someone that is not supposed to place a Dino in one of the shared sanctuaries does (we call this person a spoiler) then it means one alliance with up to 50 people could lose access to that sanctuary.
So if you joined an alliance and you are directed here to read this it is because they want you to respect this and respect all alliances that work with this to offer alliances this possibility to have in our case 3xlvl 20.
You can identify co-op sanctuaries by their level, they are usually L10 or higher. Obviously though they start out low so in this case you can tell by the high level of dinos in them, we use high level dinos to help build the sanctuaries.
Some general facts:
You get the same amount of dna from a dinosaur that returns from a level 20 sanctuary as if it would have been in a level 1.
Here is a T-Rex lvl 30 returning from a level 20 sanctuary.
There is a cooldown period of 3h to get the most dna from each dino.
Before you use food, interact or play you can hold the finger on the one you are going to do and see how much dna you would receive.
In the example below you see a Pulmonoscorpius that if you use food you will receive 7 epic dna. You also see the sanctuary points that you will contribute with.