A loss of potential is not a material loss.
Active competition does not create a loss of revenue. Inefficient competition creates a loss of revenue.
Value is subjective and determined only at the time of sale between the two parties making the exchange (all prices are past prices). Your art is only worth what someone is willing to give you for it. If it is a nickel, it is a nickel whether you worked on it for 1 month or 10 years.
There is one copy and one original. They are different goods.
Again, the value is subjective. They may not get the same price in trade. There may only be one person willing to pay $10 for one, and $8 for the other.
Sure, the one who brings it to market first. I think you’re still confusing the idea with the actual production of the good.
The idea behind a painting, the combination of brush strokes and the particular colours and shapes is not ownable, in that anyone can conceive of the same idea at no net loss to the first person with these ideas. The actual production of those ideas has value in trade, and does not constitute a zero sum game.
A really big stumbling block for people, is coming from a labour theory of value perspective to AE which is based on the subjective theory of value.
That is, value is determined subjectively in the market place. Not all paintings have value, all paintings are likely to have different values to the same people. So when people speak of “lost value”, that’s a non-concept in that value is measured by price (what will it take to buy it from you, how much will I pay for it - do i value it), and price is only determined at the moment of sale.
The seller does not dictate the price, because without a buyer willing to pay a price, no exchange is being made. I could value my hourly labour at $500 an hour, but if no one will employ me for more than $18 an hour, I am only an $18 an hour labourer, whether I think I am worth (value) $500 an hour or not. Likewise, creators of goods, art, services can price their side of exchange at any price, but it does not become a market exchange value until a buyer to sell can be found to match.
There is a HUGE difference between “Someone said they would pay me $200k for my home, so it is worth $200k” and “The guy is here and he has $200k to buy my home right now”.