Quick one. Ran all 45 original charts from a solar energy client through reverse image search. 73 sites were using them, and 44 of those had no link back.
Sent a friendly “glad you found it useful, mind adding a source link?” note with no copyright threats. 17 added a link within two weeks. About 6 hours of work in total, which is a better ratio than any cold outreach I’ve done this year.
How often do you rerun this, and do you ever get firmer with sites that ignore you?