This reminds me of the time I got free data transfer on a major cellular carrier by writing a script that would take large files, split them into 1MB chunks, prepend a PNG header to them and send them through said carrier's email-to-MMS gateway (a corresponding script on my phone extracted the original file. My carrier's email-to-MMS gateway didn't re-encode images and I had an unlimited texting plan, so this was a nice setup. There was a de-facto transfer limit of 500MB/day (Gmail limits you to 500 emails a day, with 1MB/email, and the email-to-MMS gateway rate-limited smaller email servers after 100 messages)