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Git scraping: track changes over time by scraping to a Git repository
(simonwillison.net)
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Assuming each action takes 1 minute, it will use (assuming 30 days in the month) 2160 minutes exceeding the 2000 free tier monthly limit.
But apparently Gitea Actions are compatible so you could go with that.
And that's just a single repository. Although for a single JSON scrape it shouldn't take a full minute
According to the Actions log for that repository it generally takes about 11-16 seconds per scrape, nowhere near a full minute. Worst case, if it's 16 seconds every time, for a 31-day month that's 31 days * 72 actions/day * 16 sec/action = 595.2 minutes, well within the free tier limit.
And if it does become a problem it can easily be scaled down to once per hour or something with a single git commit.