TPG- Super Fast Standard /100GB for $50 - Upgrade for free
Just found out about this a little while ago. If you are with TPG and on 80GB/50$ plan then you can upgrade to 100GB for free. I dont know whether there are changes to other plans or not but It's worth check it out.
All you need to do is log in TPG using your account and choose change plan, after that follow the instruction.