Our aim is to keep the database free. But over the past  years, monthly costs have skyrocketed. Because we had to switch from sponsored free hosting to paid (but much faster) hosting, we lost 800 euros annually. In addition, we have 3 paid plugins and the monthly costs amount to almost 100 euros. A lot of friends of the site are asking how they can contribute. That is why we have created this Paypal link. Since that time we were supported by a lot of people. But please don’t forget our costs are yearly so we are happy with all support we can get.