Isn't it worse than that? If both companies purchase 100% renewables from the energy supplier, do they say no to one? I disappointingly found out that my carbo

Isn't it worse than that? If both companies purchase 100% renewables from the energy supplier, do they say no to one? I disappointingly found out that my carbon neutral tariff doesn't guarantee a purchase of renewables, it just guarantees that any energy I use that is over their wholesale bought amount of renewable energy will be carbon offset, which is complete crap.