Oh, also worth noting that the first 3 steps are cheaper than buying a megabox. I usually only buy steps 1-3 every step up and the 100-coin starter for series boxes. So far I've pulled Alex on step 1 and Dolce on step 3
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Step 1 = 1 card @ 100 = 100 coins/card
Step 2 = 2 cards @ 300 = 150 coins/card
Step 3 = 3 cards @ 500 = 166 coins/card
Megabox = 14 cards @ 3000 = 214 coins/card