Marketing activities in furtherance of, or customarily incidental to, the sale of agricultural commodities shall also be permitted, provided that all revenue collected is related to the sale of agricultural commodities. Such marketing activities include, but are not limited to, pick-your-own and cut-your-own produce, instruction to customers in horticulture or other disciplines related to the agricultural commodities produced by the owner or operator of the property, tastings and free samples of agricultural commodities, and tours of the agricultural facilities on the property.