on their own games yes. From third party games? not really. The cut is about 30% or so either way.
Nope. Not sure where you got that idea, even if you completely ignore inflation (which you should not).
Sony only gets 30% from third party games, which is what I said. If all that PSN revenue was only from "selling third party games" then there's no way profitability would be as far past *the entire PS2 era* as it is, since it's impossible that they sold more games in two years on PS4 than they did in 6 years from 2000-2005.
Sony gets 100% from their own first party titles on PSN which is not subject to retailer cuts. This is easily 3 times as profitable as a first party game sold at retail during the PS2 era.
Sony gets 100% of all DLC sold from such games.
Sony gets 100% of subscription fees to PS+
Sony gets 100% of all advertising revenue on PSN, and this is not insignificant
Sony gets 100% of all revenue from PSNOW, which is not insignificant.
Sony gets a cut of revenue from streaming services they own like PSVue.
All of that stacks up to add massive, massive amounts of revenue (and profit) that are above and beyond what is coming in via simple sales of third party games. Think about this.
edit: before we get too far off track, the point of this is that Network Services are THE driver for PS profitability going forward, and it's not just "selling retail games through PSN." Sony is extremely interested in keeping this gravy train going, the PS4 is by far the most profitable gaming hardware they've ever come up with, if not the most profitable device of all time BECAUSE of the ecosystem.
No one in their right mind is going to say a 100 dollar loss per unit is too much to sustain that. you could double that loss and Sony would STILL do it.