The math, honestly

Blackjack played with correct basic strategy runs about a 0.5% house edge against the amount you wager — not the amount you buy in with. That distinction does most of the work here.

That's a tie on cost, and a win on risk. Everywhere else on this site the biggest danger is named plainly: banks close accounts over repeated money order deposits. A withdrawal back to your own bank from a licensed operator produces no such pattern. If you're running this weekly, that matters more than the nine dollars.

And because the edge applies to what you wager, a modest session — buy in $1,800, play a couple of shoes at table minimum, colour up — carries an expected cost well under the money order route. You are not obliged to churn the full buy-in.

What it actually takes

• Correct basic strategy, memorised. The 0.5% figure assumes it. Casual "play by feel" is nearer 2%, which turns a $9 cost into $36 and kills the advantage. It's a fixed, learnable chart — a laminated card costs a few dollars — but you do have to learn it.
• Good rules. 3:2 blackjack, dealer stands on soft 17, double after split. A 6:5 table pushes the edge past 2% on its own; walk past those.
• Enough play to look normal. Buying in and immediately colouring up is the one behaviour that draws real attention, because it's what laundering looks like. Some play is the price of a clean exit.
• Shuffling defeats any clever ideas. Most rooms now use continuous shuffle machines, and online tables reshuffle every hand. There is no card-counting angle here and you shouldn't go looking for one — basic strategy is the whole method.

The obstacles that are real

• Mastercard loads, Visa mostly doesn't. This is the single most important practical fact. Prepaid Mastercards fund regulated online casino accounts fairly reliably; prepaid Visa gift cards are declined far more often than not. Buy accordingly — if online blackjack is your liquidation plan, the Mastercard weeks are the ones that matter.
• The rules change constantly. Which BINs load, what the per-deposit limits are, and whether a given operator accepts prepaid at all can shift week to week. Start small and scale up as you build confidence — a $50 test deposit costs you nothing but a few minutes and tells you what a $500 one would have done.
• KYC is not optional. Licensed operators verify identity before they will pay out, and a deposit method that isn't in your own name can hold up a withdrawal. Expect to provide ID; expect the withdrawal to go back to a bank account or card you own.
• Variance is not a rounding error. The half-percent is a long-run average. Any single session can swing hundreds either way. Over a year it converges; over one Saturday it absolutely does not.

Verdict

A legitimate route where it's available, and an underrated one. It costs about what money orders cost, and it removes the deposit pattern that is the single most common way people lose bank accounts over this hobby.

It asks more of you in exchange: memorised basic strategy, a state that permits online casino play, Mastercards rather than Visas, and the discipline to actually play rather than chase. If you already play blackjack competently, it's arguably the better liquidation channel. If you don't, learn the chart before you learn this — the edge only exists if you play correctly.

What you actually need

Three things, none of them expensive. The edge described above only exists if you play correctly, and playing correctly is a chart you can buy for the price of a sandwich.