This was definitely possible the first couple days if you're lucky enough to pull a Perfect Card, or even better two
Sell them for a huge payout of 50,000 PP each then buy packs like crazy.
If you get lucky with your pack pulls, rinse and repeat.
Matt managed to do this on one of his teams already, no cheating involved.
We've lowered the payout for auto-selling Perfect Cards a bit now (to 20,000).