Either way I'm guessing I missed a chance to accumulate a few? Enough to get me to silver or gold?
More than likely silver (if you where a QFF, and flew only OW airlines), perhaps even Gold, but there are a few conditions with that.
First it would depend on the FF program you chose, certain FF programs are more generous than others, and some airlines are more generous than others in awarding SC's to members of other airlines FF programs, even if they are all in the same alliance.
Some of the cheaper ticket classes do not award points or SC's full stop.
Certain types of flights do not award points or SC's full stop.
Certain destinations on certain airlines do not award points to other airlines programs
Some airlines will award points to other airlines FF programs, despite them been part of different alliances.
Don't assume because the economy ticket seemed "expensive economy" that it didn't still book you into a discount fare bucket. As others have said, unless you are specifically in Y class, most airlines treat all other classes as discount, despite the fact that I have see a case where "discount economy" bucket was more expensive than full Y.
PE often doesn't award any more SC's than standard economy.
So without knowing exactly which program you where looking at joining, and which airlines and which exact fare bucket the flights came out of, it's impossible to say how many SC's could have been earnt. Of course if it was a number large enough to start moving up the ranks of the FF program, would you want to know?
Obviously if you feel you do enough flying to start moving up the ranks, the question should be, which FF program will suit me, rather than "what if".