I think they use Gokoins so that it's easier for both them and users when they have multiple games running with a decent part of player base playing more than one of them. And, while a bit strange for people using just one game, this isn't so hard to work out. To buy all the existing expansions you need 450 Gokoins. 230 Gokoins cost $20, so it's easy to see that you need to pay those $20 twice and you are set, not wasting any substantial amount of money. The fact that you have to make two separate payments can be a bit annoying, but with internet payment taking less than a minute I think I can live with it. I don't know how they will work out Guilds addition, but even if I have to make two micropayments of $2 to get 40 Gokoins I need, that's something like 2-3 minutes for the whole process including actually purchasing the set once I have Gokoins, not a huge problem for me.
My point is this: You need 450 Gokoins to buy the stuff. So they can advertise that it costs $45. As long as I can pay $45 or less and get that thing, I'm happy. But, if you could only buy 200 Gokoins for $20 and I need to pay $60 in real money to get the thing I want, that's not cool.
As of now, that doesn't appear to be the case. It looks like I can pay $40 in real money to get what I want, which is great! I LOVE money! I guess my apprehension is that if I do that now, and Guilds comes out and I'm forced to get another chunk of 100 Gokoins for $10 for a $4 expansion, now I've paid more money than I should and I have these Gokoins that I don't care about. It makes me not want to buy their thing until Guilds comes out, and then only if I can get it all with some fancy method that doesn't leave me spending more money than I want to.
It seems this could be solved by just using dollars to pay for stuff. I don't mind clicking my mouse a few extra times, but I don't see any benefit in Gokoins whatsoever to anyone except Goko, and I have problems supporting someone who uses that business model.
Currently a game of Power Grid requires multiple people to find 2 hours time window to meet...
Everybody says Power Grid takes at least 2 hours to play IRL. My group can get through a 4P game in an hour pretty easily, and 5P in 1:15 or 1:30 tops. Of course, they credit me with that fact since I'm always banker, and there is TONS of room to expedite the game IRL (Bureaucracy phase can take zero time if you plan correctly). Yeah, I know a computer can do it better, but I'm just trying to take some credit here for being awesome.