I don't think it's fair to call the "virtual lottery ticket" of ME3 MP packages as dishonest. People were told exactly what they were buying.
Whether it was a good idea to implement this however, is up for debate.
I, for one, got rather annoyed that I didn't get a good "ticket" and stopped purchasing packs after a try or two.
Maybe it should be the consumer's job to know their limits. It's the consumer's responsibility after all.
For the record, you stopped buying because you had bad luck. Do you know how the vast majority of habitual gamblers start out? Winning. Going on hot streaks, hot streaks that they are convinced are the norm that will be replicated if they just keep pumping money into the system... and ultimately wind up paying in MUCH more than they ever get out.
You bought, with real money, the item pack for the chance to get something you wanted. Here was a higher chance of you getting something you didn't want than there was to get what you did. And you weren't communicated clearly the chances of getting what you wanted. How is that different than a virtual lottery ticket or slot machine? At least with gambling, the casinos/lottery operators are legally forced to give you the odds of winning if you request.
And, again... assuming consumer responsibility is, to put it plainly, dumb. Look at industries that made this assumption: alcohol, gambling, tobacco, fast food... these industries said "our products are possibly unhealthy, but if people are smart and use them in moderation, then they are totally fine... So we don't need to put any safeguards in place."
And yet, now, all of these industries have regulations placed by various governments on them. Restrictions on advertising, disclosure information required, age restrictions, lobbyist organizations who make it their entire existence to put these industries out of business, tons of money in donations and programs to help combat their negative images...
People will always do stupid things with the products and services on the market. And if they can say with any level of confidence that the problems that befell them are because of your company, they will.
It is better to take steps as an industry first to self-regulate rather than wait for the wordt to happen and suffer the insanely harsh penalties that come from the mob that comes with torches and pitchforks.