Whenever someone's loyalty is questioned, those looking from the outside will mostly choose the loyalty side, because from the outside people appreciate the sentimental value of rewarding those who helped a person to get where he/she got as a payback rather over the personal gain, while those in the situation get torn in between satisfying their heart or go with the reasonable brain. This situation is something you will run into in work field often. A company will train/teach you as well as grant you experience, but their next in line offer is not as good as another one. So you move to another company with a better offer. Yet, it's rare to question someone's loyalty when it comes to switching work because of this, and that's because when it comes to making a living, people will supress their hearty feelings and choose the brain. However, when the work field is filled with passion, there will be mixed feelings, there will be confusion, and at times, the hearty feelings will overtake their brainy counterparts.
As a mainstream example, I will use soccer player Luis Figo, known for his infamous transfer from Barcelona FC to it's eternal rival Real Madrid, a transfer considered by a lot as the ultimate betrayal. For those unfamiliar with him (and didn't bother reading the wiki), Luis Figo joined Barcelona in 1995 and was relatively still an up and coming player, but in Barcelona, he boomed to stardom and ranked into the team to eventually become it's captain by 1999 and one of the best winger players of all time. But in a sudden and unexpected move, he signed for their rivals Real Madrid which enraged a lot of people, many cited how disgraceful for someone who was honored with the captain badge to switch teams to the rivals, but they didn't have the information he had, they quickly judged the situation by heart. While for him, he was told of the huge salary boost, the chance to be involved in the Galácticos campaign (shortly, the club bought world's biggest stars) and the club's goal to win the prestigious European Cup. The sane decision was to switch teams, despite how much his heart disagreed. And if he had let down of that offer, he wouldn't have won the Golden Ball nor have won the European Champions League, both which are considered a major career success to any football player.
Luis Figo(Right) in his Barcelona shirt with captain's badge. Left picture showing Luis Figo when he was introduced as the new Real Madrid sign for 2000 season.
Out Starcraft II scene is overflowing with passion, and comparing the previous to a similar story which is the HuK transfer from `Liquid to Evil Geniuses would explain a lot. In our foreign scene, Liquid and EG are the most competitive and prestigeous teams with rivalies between the teams (Jinro-IdrA era, HuK-Idra era, Hero-PuMa era, not to mention the Sheth all kill incident). The hatred between the two teams might not exist like it does between the two football giants, but tension and competitiveness does. The switch was controversial back then and HuK got a lot of flak because of it, because the fans are passionate. Fans however didn't see the career improvement HuK's new contract had; Salary boost, the option to stay at a team house in the US, access to SlayerS house in Korea and paid trips to offline events. Liquid's contract might had similar privilages, but on paper the EG offer was better. It was the correct move career-wise.
HuK as a Liquid player on the right. HuK donning his EG shirt and a sexy smile
Most fans often forget that the players themselves are also fans. Just like us, the passionate player have a favourite team they like more than others, and some of thsoe players are members of another team, for example, Scarlett the WCS NA champion is a fan of the team NS HoSeo despite being a player member of the team Acer. Some might luck out and play for their favourite team and those players will most likely show the highest forms of loyalty when it comes to other teams offers, and that's when it's most dangerous for a player's career as they would react to their job from their fan side rather than the player side, leading to bad decisions career wise. Players being fans complicates business, however, the players should always prioritize this is a job over something they love doing and passionate about. They need to draw the line between being a player and being a fan.
Stephano rumored to be EG's next sign up following news of unrenewed contract with Millenium and already receiving criticism of being disloyal.
I hate to sound like someone who's calling for discarding loyalty and run after money, I'm not. I'm just trying to explain that from a fan perspective, we need to take into account that even if the player makes the decision to move, it's not an easy decision they made, they -just like us- are conflicted between rewarding their team for bringing them up and seeking their own interests in improving their job. Loyalty is something I'm sure a lot of us will treasure when it comes to a member of our favourite team, but we should always keep our minds open and understand why one would make such decision.