Found this by accident. You simply agree for vzw selects ads and that stuff. However you can turn it off maybe few hours later if you want. It's for one cycle and works per line.
Put it your number and you will get a text message with pin, put that pin in and click agree. That easy.
I know many people won't like verizon selects but it could help out some people the bonus data.
Or shortened link due to Slickdeals
For some reason you have to copy and paste the link below.
I tested on the new verizon plan, don't know about others.
10 lines = 10gb bonus for one cycle.
I have tmobile but my family is on verizon.