The promise of really cheap AI sounds amazing and is amazing. People will happily accept and engage with "free stuff"; but, I presume you are not starting a business to give away free stuff. Unless you have some model that let's you capture value some other way. e.g. Meta just gave everyone a small computer for free with Muse. Or have some sustainable price advantage on the underlying compute e.g. you are nvidia and make it yourself at scale.

I think you deserve to be compensated for your work! It's hard to make a sustainable business when selling something that costs $5 a month to developers (just seeing your calculator). There aren't that many of us, and AWS/GCP/Azure/Cloudflare have our credit cards already. If it were me, I'd be trying to figure out how to charge more and sell the value of the work you are enabling your customers to accomplish, not the cost of the underlying electrons.

Keep it up!