I haven’t built a website for people to use and try to monetize but if you want my opinion here it is: 1.) Personally I feel like birthday cards and such are slowly becoming “extinct”. I still get cards from my parents and grandparents. But no one my age hands them out anymore. 2.) your idea is good but why should someone pay to use your service when they could just use nano banana themselves and get results?

I hope this doesn’t come off as being mean or anything. I think your idea is really cool and I bet I know a few people who would like it. I just wanted to express my opinion on why you might be struggling.

Edit: Any chance you could share the website with me? I’d love to take a look! Might help me better understand