Hello, I am a Games Developer and i found this post very interesting and just wanted to contribute my opinion.
It is specificly the first part refering to Demos in games and how many games now seem as if the developers behind them are just looking to make money instead of share their art and work in the world.
Demos have certainly fallen out of fashion since the later 2000s and I believe this is due to the contributing changing video game market as they have become less effective as online stores like the play store become more competitive and diluted.
That said I do believe they can work a dream in markets such as Roblox inwhich the player has already purchased ingame currency with real cash, I have found in such markets players are more open to spending cash as they dont see it as spending real money, even though they are.
While these markets are stll competitve and players tend to not buy games outright if there is a free alternatve, if you offer a demo for free and they enjoy it they tend to be more open to spending currency on it. This can not be said, at least to such a degree in my opinion for other online markets like the play store where its straight from cash to game.
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