There's a hacker going about. I know people have already covered this a million times, but DO NOT LOOK INSIDE OTHER PEOPLES PROJECTS! It's how the hacker gets you from what I have heard. You're better off looking at other projects on this, as I do not have the answers to your questions about this, and I apologize for this. I just wanted you guys to be aware so that none of you get your accounts taken <3 Stay safe, and maybe get an alt if you'd like to stay safe. From what I heard, older projects are most targeted. Do not check on your projects if something has changed or they look weird, it's most likely been messed with.
BETTER EXPLANATIONS : https://scratch.mit.edu/projects/1315772178 https://scratch.mit.edu/projects/1315847698 https://scratch.mit.edu/projects/1316049532 https://scratch.mit.edu/projects/1315845320/ https://scratch.mit.edu/projects/1315784018/ some may be entered twice so my bad. also, newer projects may also contain malware, so please stay out of them as well.