I see where you are coming from, and agree. I also see where the article is coming from and it is from the point of view of the seller and particularly a new, s

I see where you are coming from, and agree. I also see where the article is coming from and it is from the point of view of the seller and particularly a new, small, little resource seller. When one is in that situation, the real goal is to determine buying intent rather than generate revenue even though that is an added bonus. What happens a lot is that people will say they like/love it, say they plan to buy, and then they don't. Sometimes that means months of wasted time on one potential client which is a huge cost to a new player with little resources. Now the potential buyer is not necessarily lying or just being nice. Rather they may truthfully be unaware their brain has already decided "no". By asking for money or even to sign a non-binding agreement to purchase in the future, puts the person on the spot and forces them to answer honestly and bluntly. It is this weird, psychological trick to get at the true buying intent. And of course, even if they sign or pay for a trial, they still may decide no later. But hopefully it wasn't completely wasted because you got feedback from someone genuinely interested in paying for your product.