Whats the point of returning true in a developer product script?

local MarketplaceService = game:GetService("MarketplaceService")
local Players = game:GetService("Players")

local purchaseHistoryStore = game:GetService("DataStoreService"):GetDataStore('purchaseHistoryStore')
local productFunctions = {

[1] = function(player)
	if player.Character and player.Character:FindFirstChild("Humanoid") then
		-- Heal the player to full health
		player.Character.Humanoid.Health = 0
		-- Indicate a successful purchase
		return true  --- RIGHT HERE IT RETURNS TRUE BUT I SAW NO POINT IS THERE A POINT IN DOING THIS?
	end
end,


}




MarketplaceService.ProcessReceipt = function(ReceiptInformation)
	-- Determine if the product was already granted by checking the data store  
	local playerProductKey = ReceiptInformation.PlayerId .. "_" .. ReceiptInformation.PurchaseId
	local purchased = false
	
	local success, errorMessage = pcall(function()
		purchased = purchaseHistoryStore:GetAsync(playerProductKey)
	end)
	
	-- If purchase was recorded, the product was already granted
	if success and purchased then
		return Enum.ProductPurchaseDecision.PurchaseGranted
	elseif not success then
		error("Data store error:" .. errorMessage)
	end
	
	
	local player = Players:GetPlayerByUserId(ReceiptInformation.PlayerId)
	if not player then
		-- The player probably left the game
		-- If they come back, the callback will be called again
		return Enum.ProductPurchaseDecision.NotProcessedYet
	end
	
	
	local handler = productFunctions[ReceiptInformation.ProductId]
 
	handler(player)
	

	print('Finished')
	return Enum.ProductPurchaseDecision.PurchaseGranted
	
end