Like you have said, people view things in different ways. Most people here are not against having good time with playing a game nor upgrading to another level to get more coin but however, once there is so much pleasure that has to lead to cash commitment and spending all time on a video game, this can no longer be called entertainment but mere addiction, so it’s fun to play video game, more fun to want to upgrade but its addiction to spend money and time.
Unlike most other gambling addictions, if we get addicted to video games, it may waste only our time and efforts but definitely not our hard earned money. This must be a big differences between gambling addictions and video-games addictions. Still, on long run all the addictions are not having any big differences in ruining our happier life.
Well it heavily depends. Remember that games now have pay-to-win features or pay-togo-faster in the best ones, so if someone have their credit card at hand and/or it's easy or really easy for them to recharge some money for the game's virtual currency then of course they will if they want some pretty cool upgrade.
I personally met people who spent a lot more than $2k in a game that was pay-to-win. My experience didn't end up well with that person sadly, i really liked the person but it is certainly a possibility.
We need to watch carefully our actions and think something for at least 10 minutes before doing it, especially purchases.