Getting a job as a game tester is not an easy task.
You can't expect to sign up for a website that gives you the contacts to companies and expect that that will be enough for you to succeed.
That is undeniably false! These websites are only meant to help you get started.
They get you rolling, and it's up to you to keep it up.
When you get a job, you should immediately start networking with your company and building relationships with your fellow game testers in your company.
The power of a good network

• Having a good network will help you learn more and build your knowledge of game testing and how to do it better and more efficiently.
  As you start to network, you should be asking everyone around you questions on how to do this, how to do that, this way you get to learn for the journey ahead of you.
  
• Companies enjoy employees that work hard and network regularly.
  It shows that they're dedicated to their work and that they want to succeed.
  This is what companies are looking for!
• As you begin networking, you'll begin to build valuable long lasting relationships with everybody that you network with.
  Let's say you become close friends with Susie and she gets a job as a game tester for ubisoft, you ask her how she did it and if there's any room left, and she'll do everything in her power to get you hired for the company.
  Not only will you get massive forms of help from your employees, you'll also receive this help from other people in your companies departments.
  Network with them, and they'll keep you up to date with all the new jobs and great pays.
  

Networking is your life long key to success when it comes to video game testing.
So I recommend that you do it frequently.