If you can't identify the difference between typical marketing of banners on websites, adverts, etc and paying to have a game not appear on another system that's wild to me.
By the way, you can't just use marketing funds to pay for exclusivity...which I imagine some companies do get creative with how they balance the books but a marketing deal would be spending money advertising the game with the publisher and a paid for exclusive would also be paying a sum to keep it off the platform...probably somewhere close to what the publisher would expect to recoup on the co peting platform within the exclusivity time frame.
That's why companies have to try different things, Sonys dominance is so extreme and within its fans due to the exclusive games, deals they have paid for and all around over enthusiastic fanbase, it probably costs more to sign off those dealsfor a competitor etc. The other major negative is sonys hardcore fans are so entitled that usually when some other company tries to secure a deal (prime example, tomb raider) they literally pull the developer or publisher over the coals with the help of their "journalists" to demand answers and create negative press...basically killing the deal before it can help a competing platform. crushing any fair competition, you could say.
So, Microsoft are using their asset...money to secure desirability in different ways...After the initial butt hurt from fans over the purchase acceptance will happen and Microsoft can announce and release games on their services as they please.
It would also be great imo in reporters or journalists asked Sony hard questions...how long is ffvii exclusive for? how about ff xvi etc?
Level the playing field. Are 70 pound games working? How are the sales of exclusives this gen on ps5?