And? What's wrong with your latter point? If anything, you should be more inclined to try a new web app that fits this bill. It means the developer is spending more time on getting the basic MVP up and running and isn't putting precious early-stage resources into pure aesthetics.
Try it out, see if you like it. Bootstrap is good enough - it's clean and straightforward - a totally reasonable "default" for the web. It says to me that the developer is savvy enough to know that Bootstrap exists, is perfectly fine for a V1 product, and that if we the users show the idea is good, they'll have plenty of money to put into a super-original design later on.
Try it out, see if you like it. Bootstrap is good enough - it's clean and straightforward - a totally reasonable "default" for the web. It says to me that the developer is savvy enough to know that Bootstrap exists, is perfectly fine for a V1 product, and that if we the users show the idea is good, they'll have plenty of money to put into a super-original design later on.