Games and rounds (child board of Gambling) - "Spreadsheet games, forum-based games, and discussion of individual rounds/games on other sites." All Bitcoin giveaways, raffles, contests also go here.
But it's not a game, nor a contest or raffle. It's a review, which belongs in the ANN thread on the Services Announcement board.
Most giveaway threads are no longer allowed in the Alternate cryptocurrencies sections.
This is posted in
Altcoin Discussion, and specifically points out the problems caused by large numbers of insubstantial giveaway posts. I'd argue that's not relevant here.
If this really isn't allowed by the rules, then I have broken the rules several times in the past. Sorry for that, it was unintentional. But I'd love to see this rule change: paying a small number of serious users some Bitcoin to write a review is not what lead to giveaways being banned.
When ChipMixer was
looking for alpha testers, they asked people to PM them. That could work for OP's campaign too: they'll still get to read the reviews, but it won't lead to extra publicity.
It's moreso a thread with incentivized posting in exchange for BTC being off-topic in boards outside Games and Rounds so any such reported giveaways simply get moved there so it's not nearly as big of a deal as incentivized posting for altcoins. As for a rule change, you're going to have to appeal to theymos as I don't have the power to change policy.