A free image host doesn't give me much confidence in the guarantee of "image will not expire". Also, I don't like how me and my 10 images are on the same free tier as the guy abusing the service with 1,000,000s of images.
This is also my problem with Discord: no way to give them money as a server operator. So every time there's downtime or API issues, I think of the Discord servers I've been to where children are literally spamming a channel as fast as they can and I get annoyed that there's no way for me to get a better, paid tier for my server where we're trying to do some serious work.
Having no business model or hiding it from the user (I didn't see a /pricing page) does not seem like "no bullshit" to me. It just reeks of borrowed time, ephemeral weekendware, or VC funding.