Tried concerting the +/- to number string and letters for passphrase…did not appear to work with steghide passphrase. There is definitely information in the gift file. If you fire up the image in GIMP you will find blocked out pixels at another layer. Use the brightness and contrast tools in gimp to reveal.
The "punisher pic" also reveals interesting information when using the brightness and contrast tools in gimp haven't fully revealed the information but there are patterns there. Ghidra may help on the gift image. I had an older version and was unable to get through the python analysis before it would crash my systeem. (I was on a shitty laptop.)