... and everyone seems to find as normal to have to pay again for an apps that had always been in beta ...
ObjectDock? Well . . first . .not everyone has it . . so they wouldn't "pay again". Second . . the gold version does exactly what it says it will do for the OS it's certified for. Third . . . the beta version is optional and does improve on the gold version (except for unsupported OSs).
So in the end . .it's a good deal for many people. If it's not a good deal for you . . don't do it.
For everyone else . . . ODNT rocks and will continue to rock. And OD+ is a phenomenal application well worth the money.