For my fellow Steemians, I will be doing a few posts a week on Whitehat hacking tricks. I will take requests in the comments section, but lets keep it quasi-legal here. I'm not teaching you how to DDOS the servers at your old job because they fired you.
For starters, I recommend using Firefox for any streaming content. And the first thing to do when you install Firefox is go to Options/Add-ons/Search, the find MultiLoginApp Canvas Defender. This generates a kind of "white noise" that covers your browser fingerprints, so websites can't recognize your computer each time you log in.
Method One
This method works on sites that don't ask for your CVV (The 3 digit code on the back of the card). Now go on This Site and generate a credit card number. Don't get all excited, you can NOT use these numbers to make purchases, they aren't real. But the websites you are getting a free trial from can't tell they aren't real. This site will not give you the expiration date or 3 digit code from the back of the card. Sing up, enjoy your trial, then repeat when your trial period is over. There are also Apps in the Google Play store that will generate credit card numbers based on the Luhn Algorithm.
Method Two
If you are trying to get your free trial on a site that requires the security code and expiration date for your card, you will need a real card. Now we are going to use a trick in the way email providers read responses. The best one for this is Gmail. You can change your Gmail address any number of ways, and your "validate account" message will still go to your inbox. Gmail doesn't recognize periods as a valid character. So if you email address was steemstar@gmail.com, you can make it steem.star@gmail.com, or s.tee.m.st.ar@gmail.com, or any other combination. The address looks like a new email each time to the site, but it will always go to your inbox. You can also change the address from Gmail.com to Googlemail.com.
Stay tuned for more White Hat Hacking Tips, leave requests in the comment section and I'll do my best to accommodate.