How each bonus pays
Packz pays its Sweat-Free shortfall as Bonus Funds. Drip gives a free pack, and its terms say promotional credits can't be withdrawn as cash. DOPA's invite reward is $10 in credits. PrizePicks pays its $25 offer as Bonus Packs.
What you can withdraw
Some sites let you withdraw sale proceeds. Packz pays buyback proceeds to your bank, and Packed lets you withdraw sale proceeds from $10 while keeping deposits on the site.
Others never pay cash. DOPA credits and Packs.com Coins stay on the platform.
How to treat a bonus
Think of it as a discount on packs you'd have bought anyway. If you wouldn't have started without the bonus, it's probably not worth starting for it.