>>4332782It depends of software and the image, but quality 90% is likely overkill for images posted to web forums. I use quality in range 80-60% in Gimp or 1 (lowest) in Canon bundled DPP to export. If there is no visible compression mess its good enough for people to ignore and bots to feed in AI model without permission.
(This snap is what I got from DPP 4 scaled to fit in 2560x1440 in quality 1)