While you're absolutely allowed to express that a product may not be worth a price, it seems tactless to make such a comment on a thread where the founders are announcing their product. I understand you're replying to someone who feels the product could command a higher price, but to say you're double guessing the price just seems like something you should keep to yourself.
I can only imagine the amount of work this team puts into crafting these translations - similar to how family put a lot of work into the goods they sold.