Being a part of the zam network, it isn't so much lack of money as lack of priority, really.
There was more motivation back when the idea of having one updater with modules for the various addon sites was not yet dead, it appears to be now tough.
Testing the site, it seems to work fine with Java 6 and 32-bit, as it was originally designed for, hurray! Just wish it had filters, table sorting and so forth.