Just a tip after I was hit with this - if you want to make edits to a listing after posting, it may be considered 're-listing'. Re-listing is not covered under the program, so here's my situation:
Listed Sunday 18 March 9:18am
Ended Sunday 18 March 9:20am for edits
Listed Sunday 18 March 9:22am
Charged full final value fees.
eBay wouldn't budge on this.
Try and avoid my mistake! I'm pretty angry about it TBH. There's no warning that the final value fees will have changed etc - it's just a sneaky revenue raiser for eBay.