First of all, thank you for building Nostr.build 👏🏻👏🏻👏🏻

There is no shame in promoting your product. People have the choice to buy or not buy. 

This is a very long note. DM me if you want to talk more. I’m happy to help. 

I have no experience in B2C sales but I do have 15 years of experience in B2B sales on large accounts. Here are some suggestions for your consideration. You can take any, all or none of them:
 - Never sell yourself short. You are offering a fantastic service and giving it away for free. Put a limit on it. Delete media from unpaid accounts after 6 months. 
- Paid accounts get their media stored for as long as they remain subscribed, plus 6 months.  
 - Every time an unpaid account reaches a storage threshold (e.g., every 1 GB) or uploads a given set of files (e.g., every 100 files) send them a DM letting them know about it, and the benefits of the paid accounts.  
 - Use free accounts as your marketing . Put a small watermark or banner under each uploaded picture with a message like “Stored for free at nostr.build”. 
 - You’re probably doing this already, track the conversion rate from free to paid. You have 2 growth metrics: new free signups and free to paid conversion rate. Whatever actions you take, need to be designed to improve those metrics.