TLDR; you need to submit 4 PRs and get them merged in October to be eligible to cliam a Free T-shirt.
Digital Ocean has been sponsored this for years. I have got two T-shirts so far.
And: You can merge PRs to your own repos - you need to label the repo "hacktoberfest" or/and "hacktoberfest2022".
Each PR has a 7 day cooling down period.
Happy hacking, happy hackertobest!
Follow me: https://steemyy.com