Dream Hopper

They have a refill every 30 minutes and it caps at 3, so you basically have to play every 1 hour and 30 minutes otherwise you're loosing wishes.

You get extra bonuses and increases on the amount of gold you get if you play for more then 5 days in a row, it runs out if you don't play for 40 hours

Yes, it isn't as bad because it's chosen advertisement but you can get wishes or gold or crystals if you watch ads and because your wish cap is 3, a lot of the time you'll have to watch ads to get more

I mean, sort of, the game doesn't end but there is a goal, you can complete all wishes and get all skins and that's basically all of the content and it doesn't seem to be expanding too much so yes but it isn't problematic

They have gems which you can get in game but you can also buy in game which are exchangeable for wishes

There is a "dream master bundle" that boosts you, such as increasing your cap to 5, making the first dream of each day new and boosting your chances of a new dream by 10%. It isn't a multiplayer game but it does give you an advantage

If you have completed more wishes or more skins you may thinks that

If you're doing a wish, you can't pause the game, you have to leave it running

Yes, you have to wait for your wishes to refill

If you beat a whole category for example