I bought a few single plays and said "ok, I'm gonna drop 500 credits on this and see what happens." I opted to do it in batches of 10 plays so If I started getting wrecked, I could quit early.

I ended up spending a total of 620 credits so I could have an even 20 tries. But wait... 20 sets of 10plays at 10 credits each is 2,000 credits!!!! That's right. I won 1,380 credits over the course of the plays.

I gained a total of 49 cards at 12.65 credits each. (Based on how much I actually spent vs how many cards I got.) Then again, if you take the average cost of the cards per batch of 10, it works out to only 9.5 per card.

How is it so different? My worst set, 1 card cost me 60 credits!
On my best set, I still only got 1 gard, but I won 220 credits!!! Subtract the 100 I spent, I was paid 120 credits to take a card.

I never got more than 4 cards for every set of 10 I bought. I also never got fewer than 1 card. Out of the 49, I got 3 special event cards. When it was all said and done, I only got 3 cards I didn't care for.

If I remove those, I ended up paying 13.47 each for 46 cards. That's a little less than I'd pay for a 10% flash sale at my level. (14.63)

Long story short, am I happy with what I got? Yep.
Is it worth it? It is still cheaper, and much faster than waiting for flash sales of cards you want.
Also, If I were level 1, and wanted to pad my collection, this is WAY better than 25 credits per card.

Expecting that if you were lvl 1, you would not have the same luck as me.
You can check my results here :

http://www.istripper.com/forum/thread/41517/5?post=612019

Everything about iStripper / TGIF and the good time for a spring break game

I'm making this separate post to not mess with my answer to @kaiji. My result from this game in graphics and some explanations. I started playing with 84 credits and I had to buy 250 then 500 credits...

It's random luck, and the ratio win/lose isn't bad at all but the reward in my case would have not been 25 credits per card won.

No, the 25 credits was an average base cost of cards before discounts. (crystal clear quality)
My average was 12.65 per card. (amount actually spent out of pocket vs number of cards won) All in all a good price.

However, that said, After my post I found that quite a few of my free cards were of medium quality. Mediums only cost me 10.4 at the moment. (9.36 on a 10% flash sale) So I did over pay for mediums, and I basically broke even on Standards. I only actually made out well on the crystal clears.

It would take me a while to check all the cards to see what the total ratio was, but at diamond level, it was simply faster than waiting for 10-20% flash sales. At a lower tier, it would be a great deal at my level of success.