I would like to have only one Everleap account for all my projects (WebSites, SQL Server DBs etc...) You are not limited on the number of web sites since you can buy more websites packs. That is OK You can buy the power pack and have 10 GB of SQL Server storage. However you can't go beyond that. You can't buy more SQL Server storage. The problem here is that administrative tasks would be difficult if you have to manage several Everleap accounts.
Thanks for the feedback. We have had some other customers seeking more sql storage as well. We are discussing solutions for this, but I cannot provide any timeline or specifics at this time.