We’ve tried explaining that the ‘Request Revision’ is only for real revisions, but the only way that threat would mean anything to the buyer is if you followed up with ‘and what you’re doing is abusing the revisions’ button, which then gets very hostile. We’ve never had a buyer get snippy with us about this, quite the opposite - we find that they just say something like “oh ok, I’ll know for next time”, then do it next time anyway.
Do you offer revisions as part of your gig? If you do, one thing you could do is explain to clients that the 3 days is for THEM to feedback as to whether the quality of the work is sufficient and in-line with the brief, and that even if the gig completes, you’d be willing to offer a revision if the client comes back with a request (putting a time limit on this of course - 1 week should be more than enough). I guess this depends to a certain extent on your own policy with regard to revisions.
The other way, which is unfortunately what we’ve opted for on the handful of times this has happened to us, is to bite our tongue, say “ok”, and then just wait them out. The longest we’ve waited is two weeks, but the client told us up-front that this would happen, and paid for the revision. Not that it should make a difference, but the end-client was one of the world’s largest drinks manufacturers, and we probably allowed a certain degree of flex in order to get that client under our belt. Like I say, not how it should be, but let’s be real…
I find that 90% of the time, when we’re tasked with a voice over by a video creator (for example), the video creator only has a buyer account on Fiverr. They’re completing their work off-Fiverr, in the world of invoices and 30-day payments, where feedback is a slow process, and their client doesn’t give a monkeys about Fiverr and it’s 3-day feedback policy (they probably don’t even realise that’s where you were hired).