Classic perverse incentive.

From https://en.wikipedia.org/wiki/Perverse_incentive

"According to the story, the British government, concerned about the number of venomous cobras in Delhi, offered a bounty for every dead cobra. Initially, this was a successful strategy; large numbers of snakes were killed for the reward. Eventually, however, people began to breed cobras for the income. When the government became aware of this, the reward program was scrapped, and the cobra breeders set their snakes free, leading to an overall increase in the wild cobra population."

The funniest/saddest part is that you could just game it on your own repos, you never had to go out and spam any real projects. If you just made 5 PRs in a repo you owned with the appropriate hacktoberfest tags, that was enough to pass the mark and to get the free shirt and stickers.

worked well for a bit. but then the program became popular and that’s when it hit the curb. terrible loss, imo. it was a brilliant idea to encourage open source work with a token reward. it relied heavily on good intentions, which quickly disappeared with the popularity.