Is there any truth to the recent claims that excess power generated and exported is not actually used by the grid?

I have 17 panels that have been generating about a 200% surplus of power. Obviously I don’t pay for electricity, but I have been told by some people that the excess power that I am exporting to the grid is not actually used, even though I am paid back with up to what I have exported. Is there any truth to the claim that the excess power exported to the grid is not used, and that other homeowners are footing the bill for the power that I am paid back? Or is this another climate denial type misinformation campaign?