Line isn't bundled. It became popular through spammy marketing tactics (you can make free calls with Line!) then network effects. Kids can't use it (you need to

Line isn't bundled. It became popular through spammy marketing tactics (you can make free calls with Line!) then network effects. Kids can't use it (you need to prove you are 20+ and have a real cellphone number to get out of the noob garden), so I'm sure it won't be on top for much longer.