With a relatively quiet year of 2010 for YEH, compared to many other stars who's been getting much more coverage on net, many YEH fans have asked if YEH's popularity had gone down a bit in Korea^^
And this concern seemed to have increased for some YEH fans as the news of YEH leaving JOINUS and Basic House was recently released.
It's important to understand that the number of advertisement contracts or CFs do not accurately portray a star's status in Korea, and not all 'A list' or 'Top Stars' are at an equal level status.
It also doesn't mean that a big star has lost their popularity if they don't get much internet news coverage during the quiet period, as the biggest few stars aren't usually mentioned or searched continuously on net. CFs and/or advertisement contracts also differ a lot in guarantee pay, and the specification of the contracts are very different for different level stars/corresponding CFs. So if you see news of other stars getting more exposure on net, not to worry^^ YEH's doing fine in Korea.
Here's an excerpt from today's Dong-A Ilbo's news article. I hope it helps to answer some of the concerns that some YEH fans may have had recently^^
What do Lee Young-Ae, Song Hye-Kyo, Jun Ji-Hyun, Yoon Eun-Hye, Choi Ji-Woo and Kim Hee-Ae have in common? They are the 'Special A Level' actresses who makes your heart flutter with mere mentioning of their name. Another common bond they share is that you can continue to meet them through CF (Commercial Film)s even if it gets difficult to see them in a drama or a movie..
Although Song Hye-Kyo hasn't been active with a new project since the drama The World They Live In (2008) and the movie Fetish (2008), she has appeared in 9 televised CFs since 2009..
As for Yoon Eun-Hye, while she hasn't had a project since My Fair Lady (2009), she was televised in 7 CFs just in 2010. Jun Ji-Hyun also had 3 televised CFs even when her last film was movie, Blood (2009).
Choi Ji-Woo hasn't had a project since the movie Actresses (2009) and Star's Lover (2009), but she appeared in 5 CFs since 2009..
The contract/pay for appearing in a CF depends on the advertiser's preference, consumer's awareness and interest (of the star), and is divided into 'Special A Level', 'A Level', 'B Level', 'C Level' and etc.
[Source: Dong-A Daily]