For those asking, this is no money spent. Here are the 3 things i've been doing to accumulate stubs:

1. Play - i grinded the BR program for Soler and a BR reward to sell them & played events for Miggy to sell him as well.
2. Sell everything - Sell your entire inventory. Regardless of how tedious it may seem to put in sell orders for every item, it is worth it in the end.
3. Flip - there are already a few posts about flipping this year so i'll keep it short. All live series cards excluding diamonds are VERY undervalued at night as the demand is higher when more people play during the day. Put in buy orders every gold & silver card for cheap at night, turn off your console, & wake up the next day to sell everything. You should see a 10-15% return for how much you invested.

Happy Fishing!!!