The biggest advantage is that it returns you the direct URL to your file. So you can use it to store images for MD-based forum posts. Or put in your site's <img src>.
I use the Cloudflare R2 storage which offers zero egress fees. So I pay $0 of transfer costs.
I added a simple anti-nsfw files check and a simple anti-malware check. Please do not try to break it. Thanks! (>‿◠)