They are hiring because they have work to do; tasks to accomplish. They are hiring because at this moment, they believe whatever work needs to be done - Advaxis will need to do it themselves. They are hiring because at this time no decision has been made that would change the items on their task list OR the parties that would perform those tasks.
Reading between the lines, the only action that would appear to be unlikely would be a Total Buyout. Partnerships, licensing deals, or other ways to capitalize still fit nicely with their actions to staff up. A Total Buyout where the Buyer would run Advaxis as a separate independent division, and not integrate the company into the rest of its operations is possible but seems less likely.