Stackem

About Stackem

One of the main concerns is Bill 560/2025, which is currently making its way through the council. The proposal prohibits advertising by betting companies at events in the city of São Paulo. This applies to events organised by public or private entities, whether for-profit or non-profit.

The bill prohibits signs, banners, or display panels in arenas, gymnasiums, stadiums and other sports event venues. It also bans advertising on public transport, such as the side panel, exterior or the rear window of buses. The bill imposes a fine of BRL50,000 ($10,000) and a ban on hosting events for up to two years.

The proposal does not explicitly prohibit the display of betting brands on team jerseys, but some city councillors want to include this in the bill.

How to play Stackem

The difference is all about the risk function. A sportsbook employs traders to price bets and manage its exposure. An exchange provides an API through which firms compete to quote prices and supply liquidity.

“Here’s an API. Bernard and 88 other people can market-make all these request-for-quotes (RFQs),” Marantelli says. “Some people might come in and just do esports because they’re esports experts. Others do everything. Some focus on same-game parlays. But it’s a sportsbook.”

The institutional layer is largely invisible to customers presented with a P2P proposition. Retail users may technically trade against one another, but the depth required by a mass-market product cannot be supplied by occasional customers alone. Professional firms must be prepared to quote continuously and commit substantial capital.

What is Stackem?

On Tuesday, OpenBet announced it had agreed to acquire sportsbook specialist OmniLogic. 

According to OpenBet, the deal is aimed at strengthening the supplier’s presence in regulated lottery markets and expanding its sportsbook capabilities tailored for Tier 1 operators. 

The deal, subject to regulatory approvals, is expected to be finalised later in 2026.