From the 720€ to host the catalog, 200€ were paid by collectors identified with the golden badge. The other 520€ I paid. And as you know, this is not only the money, but all the IT stuff to keep it running and all the work to keep the catalog up to date and correct.
To repeat it: This catalog is NOT for free. Please give something back in exchange and help to distribute the effort. If you do not want to pay money, than also banana labels are welcome or a significant amout of work to keep the catalog up to date (earn "helping points"). I do not want to take nearly all the cost and most of the work to support your hobby.