Answer 1

There's no requirement to advertise codes that others made, i suppose?

Where to advertise codes?
Post in below threads and do not create new ones with same purpose.
https://www.sololearn.com/Discuss/497411/?ref=app
https://www.sololearn.com/Discuss/475577/?ref=app
https://www.sololearn.com/Discuss/830853/?ref=app
https://www.sololearn.com/Discuss/452626/?ref=app

If you like the code, you could possibly save it ( privated ) for future references...