I feel the opposite. First, Sony being Sony, I bet they think they can trick everyone into thinking that their future Spider-Man movies are still the MCU (Remember how many bogus industry rumors we got about Amazing Spider-Man sharing the skyline with Avengers 1, or how Holland was going to appear on Venom -Those probably were started by Sony themselves- ), and get the movie to 1.5 billion, or whatever unrealistic goal they have, without sharing the revenue.
Probably they think the franchise they have (Tobey, and Tom Holland by themselves) is the one attracting audiences, not the MCU or the quality of the movies themselves. And those digital sales fuel that, probably the executives are texting among themselves "See! We don't need Marvel Studios, people love our franchise, let's exploit that! Also what music is Gen-Z listening now to put in the final battle??"