I totally agree with you! A product with such a price (I'm using RUTX50) and so many functions ca not be used easily on camping sites with captive portals resp. logon pages.
It seems that none of the developers ever spends it's holiday on camping sites or only is using mobile data. There is no valid description, how that should work for RUTX_R_00.07.04.1. Maybe we've to change the product, because this was my main reason for buying the RUTX50.