While I appreciate the reasoning behind the suggestion, we can't possibly hope to catalogue every single site that a provider could conceivably advertise on, and then subsequently maintain that list; especially when including the various new sites that pop up on a given day.  

Generally speaking, ad links are accepted when they meet a few criteria, depending on where you're using said links.

For a review, the site must;
1. Have the provider's name
2. Have the provider's contact info or the means to contact the provider (booking forms, twitter replies, anything)
3. Not have reviews for any provider on the site

For ad board posts;
1, 2 and 3 above, plus if the site is a personal one (i.e. not P411 or DC or similar) any one of a bunch of TER logos that link back to TER

For the boards in general;
No reviews on the site, generally.

Now, there are exceptions and additions to these rules and this is FAR from exhaustive, but these are what we reject posts for more often than not. From your perspective Sasha, to that end, your personal site wouldn't be acceptable for an ad post as I can't seem to find the TER logo on it, but your P411 would be fine. Either site would be fine for use in reviews and general posts.