The short answer is unfortunately "yes", it is possible that he can. Depending on what sort of control/authority he had for management of the condo association before turning it all over to the other condo owners, he could have made such an arrangement on behalf of the condo association.
A couple of questions that might be asked are ... how many units did he own at the time that he made those arrangements? What authority did he have in making those arrangements on behalf of the association without consulting the other owners? What is the obligation of the new management to honor the previous arrangement? What terms are spelt out in the Condo Association docs.
So, the long answer is dependent on your unique situation or rather the situation and organization of the condo association and what position, if any, that you might be in to pursue the matter further with the developer. Is the turnover complete? Was he the sole trustee/Director until the turnover?
As I said, you'd probably be best served to discuss the matter with an attorney ... because your options are all rather dependent on your unique situation.
Feel free to contact me at greerhomes@gmail..com if you want some contacts for attorneys. Good luck!