Adding more information about these scams:
Here is a google doc summary of these fake websites and their shady behavior. (Including Wigglypaint.com, .net, .org, .io, Wigglypaint and Jigglypaint apps, etc.)
Here is a spreadsheet of the known artworks that were stolen from artists here on itch.io by these various sites and apps -- please be patient while it loads, there are over 2000 entries. Artists can search their itch display names in the spreadsheet to see if their art ended up on any of these sites.