Rio recalled the fact that if he were ranked highly he would probably gain the interest of the alchemy tower
The Baron explained to Rio that recruiters are also a part of the competition, in order to explore hidden talents, the emperor set this for people to develop their abilities
Rio could simply deny this, but Rio knew how this went, it would be lovely if they simply just retreated
However, Rio had read novels about this, he would participate and after he won he would attract the attention of an unreasonable person thinking he should be grateful he was invited, when Rio rejects the person he would then proceed to give him trouble
Considering how weak Rio was at the moment, that sort of trouble could be life-threatening
Rio needed the funds but didn't need the attention, if the attention brought funds, he wouldn't mind, but Rio was aware that with those funds came chains