What Rakon said was relatively standard in terms of sponsorship. He didn't want to invest too much into geniuses he'd just met, but he also wanted to give off a friendly impression in case they turned out to be more than they already were.
What he offered them was simple.
"Resources."
"I can give you access to resources that you can't imagine right now, and I can take you to training locations that will easily boost your strength. Plus, having a connection to the Scorch Clan and Ignis Clan could never be bad, right?"
There was a more detailed explanation, but he needed to hook them first. He was ready to give them what they needed to become great dragons even if they didn't win the heir wars.
"And all I ask for in return is your cooperation and hospitality when it's all over."
He wasn't giving them a free contract. At the end of it, they would owe him a favor that would probably outweigh the level of aid he provided them.
Okay so I may have gotten confused on the days of the week and thought today was Sunday, so...