Strange, I started playing the Jungle Cruise when I found out that Fireworks gave hardly any credits, and instantly I was earning 600-700 credits a game. I had no idea people were having so much trouble learning how to do it, it just came to me naturally.
As for the credits, I actually find this preferable to the original VMK. I live in Canada, so its not like I could go to Disneyland every time I wanted a rare item. We forget, in the original VMK items like the Stitch Hat were essentially holy grails because you could only get one if you ordered a ticket to one of the parks before a certain date. If you wanted an item from a secret code that could only be gained from a promotional website, non-Americans like myself often had to find ways of getting around the IP filter that kept out unmasked non-US IPs. The cereal box promotion that gave you the pirate room and something else were fortunately universal to each player, which meant each player could get one using the same code.
Disney mainly used VMK as an advertising platform, and its underperformance in doing that was probably the reason it was abandoned. They also didn't hold competitions the way MyVMK does. Most "contests" involved going to a host-owned room as fast as possible to try and fail to get a rare item of limited quantity that would only ever be given out once, and instead end up with a consolation pin. I would rather have to grind for an item like a Red Beanie then be forced to make do without any of the cool stuff because I wasn't quick enough to win a prize and couldn't afford and was often inelligable for the promotional things like the pirate room cereal box codes.
VMK was fun, of course, but because it had to be funded somehow there were flaws/things that took advantage of the players that I can see have been lessened or eliminated in MyVMK's fan-run environment.
All in all, the best thing to do is just make a list of items you MUST HAVE and then proceed to do what it takes to get them, while resisting buying anything else.