I mean im sure theres millions involved in a deal like this, and she has how many mouths to feed now at edam? (considering even her dancers and band members are on a contract and get monthly salaries, which isnt exactly the norm in the industry)
I dont see how its any different from the 12-13 or so endorsments and cfs she has done already this year. CFs is where the money is at, especially now when no concerts can be held.
That is true. I recollect from 2016, when she was not active, many of her team were considering other options and she asked them to stay on, paying even when was not active.
So unlike with other companies with multiple revenue streams, she and now SSK is the income generator for EDAM, even they might not mingle revenues.
She might have to keep at least a decent level of activity, even with passive income from royalty streams etc.
And I don't see an issue with this, it is a CF presented as though it is a song release. Others have done that and even she did so in her early days, if I remember right. Even a sort of short-drama with Im Siwan for a Samsung CF.
what does it change for you if the pepsi logo is everywhere? listen to it and enjoy it. And if it's not of your liking go 
