[This is again outside my area of knowledge, but let's say you can buy as specific an ad as you can articulate within the *handwave* March (~= h*archate province/state) for a reasonable price or, just as likely, you could probably commit ad fraud somehow. You could definitely do hypertargeted ads like that, and they wouldn't look that weird, especially if you're Andan traders scoping out the market, let's say. If it looks really weird, you could possibly try to blame it on the local Shuos and people will probably sigh and shake their heads about Shuos shenanigans. Meanwhile the actual local Shuos are using craptacular weird ads to disguise their real activities...]
Re: [ad-tracking in the heptarchate]