How does the progressive jackpot accumulates?

All the casinos from a specific online casino software manufacturer have the same progressive games with the same progressive jackpot, i.e. the jackpot size is the same for each of the online casinos from that specific software vendor. Every time someone wagers at a progressive jackpot game (no matter at which online casino), the casino takes a small percentage of the bet (usually 3% to 7% of the bet) and adds it to the jackpot, which is hosted, calculated and paid by the casino manufacturer, and not the online casinos themselves. And thus possible to have progressive jackpots over $1,000,000 and over $4.000.000.

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