Quote snowie="snowie"don't look at one ad so not sure what they gain from this everyone is the same as me'"
Ultimately I'm guessing RLFans gain the costs of running this site. As for the advertisers, well advertising on websites can serve a number of purposes. The idea of click through and sales for an affiliate income is one.
Other reasons maybe brand awareness, paid product promotion. Subtle suggestion and the re-emphasis of products or companies may make us think of that company in the future. For example if you are planning a trip to Catalans which company would you use?
There is also the idea of advertisers paying to have an ad which has a link back to their site. Depending on how this link is set up (without getting too technical) could have a beneficial effect for the advertiser in appearing in search engine results.
Whilst I agree that as a user the ads may appear a bit excessive. What I do know is that the ads will help pay the costs for running RLFans which keeps it free to you and I. For that I'm grateful.
Maybe if the ads are too excessive in future RLFans will increase their advertising rates so they cover their costs and have less paid ads overall.