The basic idea
Many “sweepstakes casino” products use two virtual currencies:
Gold / entertainment coins
Used for play-for-fun style entertainment. Typically cannot be redeemed for prizes.
Sweeps / prize coins
Promotional currency that may be redeemable for prizes under published rules, often with playthrough and identity checks.
Why “no purchase necessary” appears
In U.S. promotional sweepstakes law, operators often provide a free Alternative Method of Entry (AMOE) so prize opportunities are not limited to people who buy packages. Exact rules vary by product and jurisdiction.
Not the same as a licensed casino
Licensed online gambling is regulated under gambling frameworks (licenses, taxes, advertising rules). Sweepstakes-style products usually argue they are promotional entertainment under different rules. Regulators in some places disagree — which is why eligibility lists change and ads get complicated.
International readers
Even though people worldwide search this topic, many sweepstakes products — including Captain Crypto SuperSlots — limit participation to specific countries (for us: eligible U.S. states). Learning about the model does not mean you are eligible to play.