Not a bad idea! Congrats on the launch.

One of my first projects (about 20 years ago) was a free photo uploader like Imgur but before Imgur.

I was so concerned with “profitability” that I watermarked every image people uploaded. People fucking hated it. What I learned is don’t be so commercial when you’re starting out. Services usually cost a lot less to run than you imagine.

Yes you’ll get a burst of traffic when eg posting to HN, but it dies down after 2 days, then you’re back to 0 traffic (and no costs) or, you have traffic, and non-zero costs, and can tell your users “I’m going broke, time to pay”, and they’ll be mostly sympathetic and understanding.