Your comment is so naive. Most products out there have a terms and conditions that equate to 'the company can change the product at any time and you're always free to stop using it', while giving their salespeople little to no idea about future progress because that would limit sales. Even if you didn't "maybe forgot to ask", there isn't anyone to respond with the truth.
If you purchase a product that doesn't have ads and then they introduce ads - that is a huge change in the value proposition of the product.
If you purchase a product that doesn't have ads and then they introduce ads - that is a huge change in the value proposition of the product.