For me, I go to a book store and get bargain books I’ll read years later and aren’t bothered by it, so buying stuff I might only play once or read once isn’t a big deal. But I have had to back off how many things I help fund, just because of my buying power in CAD$.
I examine each project by value like page count, size, b/w, and especially what shipping costs and the final $ amount. A lot of games lately price me out, but PbtA games generally are nice and cheap. Movie tickets are like 16$ here, so if I figure I’ll play a one shot or two shot it’s worth double a movie ticket and I’ll help out the creators. I’ll especially back something if they go out of their way to give backers something they otherwise wouldn’t get.
For instance The Veil was way cheaper for backers, I think you need to incentivize backers that way, it kind of leaves a bitter taste in my mouth when it’s just a pre order thing and it’s the same price as when it comes out and the exact same product. Something limited or just a few dollars cheaper. Just show me the backers matter more than just the average joe who picks it up later. That’s my 2 cents.