While 130 teens might have been members of the same group, this doesn't mean for certain that the group or its admins encouraged any of them to take their lives, especially when you take into consideration that Russia has a high baseline suicide rate among young people. 461 minors took their own lives in 2013, for example.
Although Blue Whale has not been found to have directly caused a rise in teens taking their own lives, so called "death groups," that promote suicide are real and are a big problem, especially in Russia.
These groups encourage children to commit suicide by convincing them that they are "fat" or "losers" in this world, however they tell them that there is is another world and there they will be among the chosen ones.
In November 2016, a 21-year-old administrator of a VK group was arrested and charged with persuading teens to commit suicide. Filipp Budeikin, who went by the name "Filipp the Fox" online, is believed to be at least partially responsible for the deaths of around 15 minors.
Around the world, police have started to warn parents about the dangers of these online "death groups" and suicide games. Police forces in Belgium and France have started spreading the word and in the UK the Devon and Cornwall Police recently tweeted, "who ever created this horrible game is sick! Parents: Please be aware of this 'game' talk to your children about it if concerned."
