There are niches where the question "which channel is more effective" doesn't even come up: paid search and paid social are closed off, and there's nothing to choose from. Crypto, iGaming, forex, parts of fintech and healthcare. Advertising there is either banned or requires a license the product doesn't have at launch.
What exactly is banned
The wording differs from platform to platform, but the logic is the same: the platform doesn't want to be liable for the user's money. Google requires certification for crypto exchanges and a license for betting in each country separately. Meta blocks anything that resembles a promise of income, including neutral wording, if the account has prior violations.
Workarounds through "gray" accounts last weeks and end up costing more: the domain lands on blacklists, and legitimate advertising won't run for years afterward. We don't do this and don't advise clients to.
Why influencers get through
Because the creator speaks in their own name, not as a paid ad unit. Formally it's still advertising and is marked as such, but it doesn't go through the platform's ad moderation — there simply is none. Liability for the content lies with the creator and the advertiser, not the algorithm.
The practical implication: the script must be something the creator is willing to say. If the video is written in the language of an ad unit, a good creator will refuse and a bad one will agree — and the audience will hear the inauthenticity from the first second.
What changes in the buying process
First, there's no auction. The price doesn't rise because a competitor raised their bid — it's fixed by agreement. But it doesn't drop either: volume discounts in this niche are virtually nonexistent.
Second, there's no instant kill switch. A post can't be turned off mid-day if the stats go sideways. The decision is made before publication, not after, and the cost of a mistake is higher.
Third, attribution breaks. A direct click from a video is rare: the viewer watches on a TV or phone and registers on a laptop an hour later. Without a promo code and a post-view window, you'll undercount a third to half of the result.
Where to start in a restricted niche
With a small flight of fifteen placements across different creator types and tracking set up before the first post goes live. The goal of the first flight isn't to generate volume but to understand which creator type delivers an action at your target cost. After that, volume ramps up within a month.
And agree internally, upfront, on what counts as a result. In crypto it's a registration with completed KYC; in iGaming it's the first deposit; in fintech it's an approved application. Counting a step earlier means paying for people who will never make it to the money.
Pick a source for the task
Where direct advertising is closed, and what is left when it is.
Open the pickerA geo closes mid-flight: what to do with the budget
A regulator does not change the rules at the start of a quarter but on an arbitrary Tuesday. The plan for that day is written before the launch, not on the day of the news.
ReadPostbacks and reconciliation: what to set up before the first click
Data cannot be reconstructed after the fact. Anything that was not recorded at the moment of the action is gone for good — which is why tracking is set up before the launch, not after the first week.
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