For example: https://pdfcandy.com/pdf-ocr.html has a limit on how many times I can use a feature per hour, but if I use an incognito tab I can easily bypass that.
But with https://ichigoreader.com/upload (don't judge I'm trying to translate a horror manga I like) Even going as far as creating a new identity on Tor, it KNOWS it's me and doesn't let me go beyond the limit.
Does anyone have any ideas?