I purchased SimCash when I started to build. I now understand that when you do that you don't get ad videos or prizes from those videos. If I continue to purchase it, do I lose anything else? Like popups with free items? Can I get the ad videos back?
You may be able to get the ads back at some point (not sure), but you can always get SimCash with achievements and with the login chests! From what I have heard from other users, it’s most likely that you won’t be able to get ads back so that you will spend on more SimCash!
You won’t lose anything else if you purchase more SimCash, now that you have already purchased some.