I feel piracy for demo purposes is fully justified if you buy it after you like it. People always say vote with your wallet but it’s more like gambling with your wallet if you don’t get to see and touch the product before you make the purchase. Giving proper demos should be more common with digital media.
Vote with your wallet regards any sort of purchase. By giving money to someone you are giving them the most encouragement possible to continue doing what they’re doing. If you purchase something that you end up not liking, they will still receive your initial vote loud and clear. The gaming industry especially has shown us that companies will happily take both the money and the negative review and say ‘thank you’.