I received access to this tool as a beta tester and here's my honest review.
This tool is awesome, it does just what it promises, it's reliable and it wont let you down. Unfortunately as with everything, this is just a tool to add to your arsenal but it's 100% up to you to find ways to monetize it.
My VAs an I have 8 very active Reddit accounts and I have requested over 100 inactive subreddits over the last 12 months, out of which I only got about 15 of them. So a 15% success rate and that's from someone who plays by the rules, joins them and participates in them before requesting them and keeps active in the requested subreddits for the 2 to 6 months they usually take to gran my request, so this is by no means a get quick fast scheme, on the contrary, it's a painstaking task which requires you to be super organized and know what, how, and when to post in the inactive subs in order to fool the mods. And you also need to message the inactive admins and send the mods proof and if the subs are over 10k members your request will go to a manual review and there way too many variables you need to consider when doing this.
The value of this list comes from being able to post your links in the subs. And it would be a great addition to any blogger, who, after publishing a new post is doing its rounds of places to share it in. As OP mentioned, there's no guarantee they wont be removed or the admin comes back, but it's a roll od the die in which at least one of the dices is rigged in your favor