I too have been experiencing intermittent 429 errors on manual deploy. I was able to get the same package to upload 1 time this am (CST) but fail all other times. My deploy bundle is 1.6mb. Looks like this might be an issue within Netlify? Have uploaded hundreds of packages over the last couple years and this is the first time seeing 429 on manual drag and drop deploy. Thank you!
We’re having the same problem - deploying a simple static HTML site, no build actions beyond deployment of the uploaded files. Total size 4.49MB, but we’re getting 429 every time at the moment. Tried in a different browser to eliminate any cookie/cache issues.