Both bridges require you to log into WA with the official app once every 4 weeks or so. You can put the app in a seperate profile and completely kill its process during this time or have an old device somewhere in a closet that you power on now and then. This is possible now since WA improved their multi-client support (maybe 1 year ago or so?).
That said, don't expect anything other than basic text chat to work via these bridges.