I've been hosting this site for a couple of years that lets users share custom characters for SoulCalibur VI.
Site link: https://cascards.fluffyquack.com/post/list
Savegame tool for exporting and importing custom characters to SC6: https://www.patreon.com/posts/36746259
I started having issues with spambots posting thousands of forum posts and post comments. I decided to remove the forum altogether as it has only been barely used. I added a requirement that users can only post comments if they've uploaded a picture. With those two changes, spambots have been completely defeated (for now, anyway). It's annoying that spambots are so widespread on the internet. I get spam on my phone, I get spam in my email, spam on my websites... nothing but spam as far as the eye can see!
I also added a feature on the site letting people delete their own images. To be honest, the software chosen for the site is rather light on features. I was surprised that feature was missing, to begin with.