this is all very normal, lot’s of companies use a “work for hire” contract which means they own everything you create on the job. usually you would own the photos and then they purchase the rights from you. this is a big source of income for photographers and a rights buyout typically costs a few grand. they may object to this fact but it’s because they don’t know, not because they’re right. now because it’s easier for companies to keep track of things and it saves them money, they do this work for hire shit. it’s very normal, but you account for the sale of the rights in your rate. for a multinational company a gig like this should be in the $2k to $2500 range.