Can people mod the open world for the Sims 4?

I would say if someone is willing to make the hardware commitment to playing the Sims and build a gaming PC and play it a lot, they could be called a hardcore gamer. However, if they basically play Zynga games and want Sims to run on their Chromebook, not so much so. And this is the problem -- they want the casual players to spend money like the hardcore gamers. That won't happen.

Edit: The people who have gaming as their passion and hobby are the audience that will lay out the large investments. The people who want it to run in a browser are the ones more likely to spend a dollar on a microtransaction. If they want the former, they need to make a robust game which may actually shut some casual players out completely. If they want the latter, they need to be prepared to lose their bigger, but perhaps less frequent, spenders.