I haven't gamed on Windows in a while, but when I did CheatEngine and WeMod were my goto.
CheatEngine has really good utility outside of cheats in particular. For a time you could unlock the camera on a lot of games to get some really good (or really broken) screenshots. Though for cheating in particular, I think it's still pretty easy to find a CheatTable for most games.
Based on the MegaLag video, it looked like they're opening a new tab with their own affiliate link, preserving cookies to ensure checkout can complete, then closing the original affiliate link tab.
I haven't gamed on Windows in a while, but when I did CheatEngine and WeMod were my goto.
CheatEngine has really good utility outside of cheats in particular. For a time you could unlock the camera on a lot of games to get some really good (or really broken) screenshots. Though for cheating in particular, I think it's still pretty easy to find a CheatTable for most games.