Determining if user has expired 30 days on free-trial websites? [closed]
How can websites know if I had expired the evaluation period on them?
There are several websites on internet, which offer good services, like realistic voices. I was on a random one and tried out a text-to-speech service. This website had several restrictions and after I had used the maximum potential, the website had locked my session. Of course, it is not good to go after curiosity, but I tried to unlock this session by deleting my cache and cookies on browser. But still it says that I had to buy the unlimited version. I also tried a LIVE linux OS on my VM, but still no access. I have one thought about this locking. Do these websites record IPs? If yes, I got my answer, but if no, how do they manage sessions locking after the expiration without leaving any information on computer? I think it is rarely a server-side issue.
Are there good sources on internet, where it can be read. It is like magic.
