It all started as a joke - I got the idea while talking about it with friends over beers 😮. We were talking about all the new types of collectibles - possibly inspired by me following Alts.co, a newsletter that talks about all sorts of new alternative investments - from comic books to wine and whiskey. I connected the 2 dots and got a brainwave - what if you could collect highly sought-after craft beers? Moonshot... Source: almost 2 years ago

Here is my product: https://matchkraft.com/. It is a marketing toolkit. I think you need to ask for feedback, asking why users don't want to pay for a premium subscription. So far, you are getting new users that is a good sign you are going to the right direction. Maybe, who is your ideal customer or maybe your product is ok but need more visibility (maybe paying ads). Try to get active users. I really want to... Source: about 1 year ago

Calling a 3rd party API: There is a complete ecosystem providing "google-sheets-as-DB". I personally tested and recommend https://sheetson.com/ but there are a lot more with free tiers https://sheetsu.com/ https://sheety.co/. Source: about 2 years ago