Seeing Jack walk out of the tent, Dilos looked satisfied.
As long as Jack worked under Dilos, he could have all the money, fame, and fortune he wanted in the future—and even make his dream come true. That was incredibly tempting to Jack at this stage, and he simply couldn't refuse. Even if he'd had some reservations before, so what? Faced with all this, how much choice did Jack really have? Especially after seeing Dilos use the serum to cure one of his team members, he had to admit that Dilos had the means to fulfill all his needs.
As for whether Jack might betray him halfway through, Dilos wasn't worried in the slightest. For one thing, as long as Dilos was around, Jack could reap plenty of benefits. And even if Jack did betray him, once he witnessed Dilos's ability to erase memories, he wouldn't dare act on any treacherous thoughts.
Just imagine: not long after betraying him, you discovered that the memories of your friends and family had been altered. Everything about you would vanish without a trace, and no one would even remember you. Who would do something so stupid under those circumstances, unless they had something wrong with them?
Still, afterward, Dilos would need to make some appropriate changes to the memories of everyone involved, including Jack.
After all, word could get around. Jack was fine, but if some loose-lipped member of his team accidentally let slip that Dilos had superpowers, it would be a real nuisance for him at this stage.
So, before the transport plane carrying the supplies arrived, Dilos used his psychic ability once more and altered the memories of every member of the team.
With so many people, it took quite a while. However, Dilos's psychic ability had improved considerably over the