Excludable = you can exclude people from benefiting from it. (E.g., Fixing global warming is not excludable while temperature control in your own house is.)

Rivalrous = more people getting it leads to less for others. (E.g., Software is not rivalrous, but hardware is.)

I wanted a rephrased statement, not a dictionary extract. Because I still have no clue what your piont is.

My point is just that the words this guy is using have commonly-accepted meanings and he’s using them wrong.