I bought 10 packs when the new packs came out. I am a DOFF hor and I had the spare points, so why not. I got a Tuffli on my 2nd or 3rd pack and I was thrilled (sold it for 82.5 million). A few hours later I decided to spend some of my new cash on a few more packs, mainly hoping for a cannon focused Energy Weapons Officer. Bought 5 more packs for around 4 million each. Got another Tuffli. And 2 purple cannon officers. I almost passed out.
Of course that means that all of my luck has now been used up for the next 20 years or so.