The static plan has no databases, you need either the Advanced or Corporate Plan, or our Ad-Free plan.
If you need 99% uptime then I recommend you upgrade to one of our Paid plans.
The ads don't always show up first time, try refreshing the page a couple of times and you should see it (Also make sure you don't have a ad blocker enabled).
The only way to get more databases is to upgrade to one of our paid plans.
There are ways to merge databases but I don't think there is a 1 step way, I think you will need to Export one of the databases then import it into the other databases.