I used to play a game called "eRepublik". It's a browser based economics game. I adored that game, played with it from beta, was one of the best in my entire country out of a good few thousand players. There was a statistic for strength which you could increase - once a day - by clicking "train", and I had one of the highest strengths in the entire game. Then the developers introduced a system where, if you used "gold" - a resource you could purchase infinitely with real life money - you could e.g. get triple the strength gain. I immediately quit.
I just signed up to this extremely fun game called "The West". A few minutes in, I thought I'd definitely play it some more. But then, after fishing in a stream, I ran out of "energy". And I was immediately prompted: "You have no energy. Wait 8 hours. Alternatively, buy all your energy back now, for only $4.99!!".
Edit: Thanks to WarpedWiseMan for - albeit mistakenly - providing me with another example of a piece of shit. That game he posted bombards you with "Buy premium hero mode now!" which basically means you character is twice as good as everyone elses.
Just pathetic.
So, are there any games without this sucky feature? Maybe like Runescape, with a subscription. I don't mean ephemeral games like the ones in miniclip that you spend a few hours on, I mean an RPG type game, like OGame, DarkThrone, HoboWars, etc.