I think supporting independent game publishers, and I include self-publishers too here, by buying their games gives you a warm feeling. In many cases, your money goes directly to one or two people who you know by name, whose photos you've seen many times, whose newsletters you've read, who you followed on Twitter and who you've started to trust. If their game was published with the help of a crowdfunding platform, you will have lived through the journey of the game from its first public outing to the final, finished product. Yet, independent doesn't always mean small, and some publishers who seem to be large are actually only a handful of people. So if you like helping small publishers, because you want to know that your money goes to a couple of great people who deserve your support, you might have to think carefully.
Let's not beat around the bush - Kickstarter seems to become more and more the de facto way to sell tabletop games. It used to be the domain for small designers to make their game become a reality, but now established publishers use the crowdfunding platform to bring their latest release to market. I don't want to discuss whether this trend is good or bad - there are plenty of discussions on this topic already. Instead, I want to focus on how people use it to buy games and what their expectations are.
The advent of Kickstarter and other crowdfunding platforms has changed how people buy games. Buying games from renowned publishers through an online platform has never been particularly controversial, but buying new games from little known designers who decided to self-publish their games is more tricky. At the end of the day, it is very much about trust, and someone who is unknown will find it very hard to build up that trust with potential customers. Therefore most crowdfunding campaigns now come with a free print-and-play (PnP) download option, so people can try out a version of a new game and decide if it is for them.