This program is a type of rewards system for gaming, giving you credit as you play many computer games. I used it in a previous beta, but they completely lost track of it and eventually shut it down. In this beta they have promised to grant all previously gained credit and seem to have a better plan of action.
They have a pretty exhaustive list of games that are supported, including RuneScape, WoW, and Guild Wars 2. Here is a link to the list: https://us.jact.com/games (https://us.jact.com/games)
If anyone wants an invite code, post your e-mail here and I will send you one.