So, now I do it like this:
First, message an admin of the group you think would be a good fit, and ask them if it’s okay if you give some codes out. Sometimes they’ll say no, sometimes it’s fine but only on particular days, and sometimes they’ll say go for it! It’s INSANELY good interaction, so most admins don’t mind all that much. It’s not uncommon to get over 200 comments when I post a code giveaway in an active group.
I’ve tried posting book trailers and such, but my best results by FAR are just posting the audio cover image, and I say “Hi guys! I’ve got some Audible codes for the US and the UK for *bookname*! Let me know if you’d like one!”
And that’s it. For each person who says “Me please! US/UK code!” I reply to their comment with “XXXXXXX is your code! You can claim it here: audible .com/acx-promo 😊” (I have that phrase on a template with the US and UK links versions so that I can give them the correct one).
It seems fiddly, but it’s honesty only a few moments work to get a potential new fan, AND you get your royalty from the sale like usual. Pretty awesome.
Now ACX will only give you 25 codes for each of the US and UK regions to start, and you need to use 10 codes up before you get your next 25. But this is cumulative. Once you’ve given out 20 codes, you can get codes 26-75 in one go. Once you’ve given out 30 codes, you can get all the remaining codes up to 100.
If you’re lucky, (and if you’ve found the right group that’s big enough and matches your genre) you’ll give out more than 25 codes when you post. Unfortunately, ACX takes a couple days to update what codes are used, so you might have some people waiting up to 48 hours for their code. So far I haven’t had a single person object or complain regarding this.
If your books are part of a series, or if you’re planning on releasing more in the series, it’s definitely okay to ask people if they’d like to join your VIP Audible Review team to get the new books the day they come out. All you REALLY need is 100 people in the US and another 100 in the UK to join a team like that and you won’t have to worry about the other options in the future 😉 This is particularly useful when people either message you or comment on your post that they loved the book/narrator/characters or whatever.
If they’re commenting on a post, and they’ve said that they want to be part of the team, get them to message YOU to join. (That stops you getting lost in the filtered messages by you messaging them!). Add their name and country to a spreadsheet, and (if you have multiple genres, or, like me, multiple authors) the series or author they want to get the new releases from.
Anyway, so that’s what worked for this particular author, and what I’ve started doing with all of them after this trial run proved sufficiently effective for me 😊