Me either honestly! The only packs that I've purchased and opened in the last couple of years are Gladius. For everything else I try to just buy the cards I need or wait for the airdrops.
Card packs are less likely than not to have cards of equal or greater value than the card pack itself (you can see the averages here), so I totally agree with your approach.
Did you end up opening your 610 CL packs? Or have you sold them? Or still holding onto them to hopefully sell for a profit?
I would suggest waiting until CL hits the 14M pack sold/burnt mark... I'd expect the second hand market to be absolutely flooded with cheap CL cards at that moment.
I agree, I'm really not sure how the team will try to motivate Rebellion pack sales. I'm curious to see how it all unfolds.