 The Roundhill Sports Betting iGaming ETF NYSE: BETZ is again making some additions to its lineup.What Happened: BETZ, which debuted in early June, added shares of Landcadia Holdings II, Inc. NASDAQ: LCA to its roster after the close of U.S. markets last Friday, marking another roster adjustment for the first and only sports wagering exchange traded fund.Landcadia joins the BETZ lineup at a weight of 2.52, just ahead of Caesars Entertainment NASDAQ: CZR, which will likely soon be folded into the ETFs allocation to Eldorado Resorts NASDAQ: ERI, as the latter is close to finalizing its takeover of the Caesars Palace operator.Why Its Important: The addition of Landcadia to the BETZ roster is notable for a few reasons. First, Landcadia is a special purpose acquisition company -- SPAC -- controlled by Houston Rockets owner Tilman Fertitta.SPACs, the vehicle by which DraftKings NASDAQ: DKNG went public earlier this year, are scorching hot in 2020, particularly in the gaming business.Second, due to index constraints, not many ETFs hold shares of blank check companies. Third, Landcadia already announced its serving as a vehicle for Fertittas Golden Nugget Online Gaming to go public.That company, which is one of the dominant iGaming names in the fast-growing New Jersey market, will list on the Nasdaq under the ticker GNOG.Whats Next: Shares of Landcadia are up more than 40 over the past month, a period including the GNOG announcement.Although the SPACs shares have retreated off the most recent highs, the stock surged 9.15 last Friday on news that GNOG landed a partnership with the Keweenaw Bay Indian Community, the operator of Ojibwa Casino.That paves the way for GNOG to offer internet casinos and online sports wagering in Michigan, a state thats expected to a major player in the sports betting arena.Michigan is the first state beyond New Jersey that GNOG is entering, but Landcadia previously said it expects to procure licensing to offer iGaming and sports betting in Pennsylvania next year. The Keystone State is home to some of the fastest-growing online casino and sports betting markets in the U.S.Landcadias acquisition of GNOG is expected to close sometime in the current quarter. The transaction assigns a proforma enterprise value of 745 million to the online gaming entity.As for BETZ, the ETF is less than two months old and already has 97 million in assets under management, making it one of the most successful thematic launches this year.Disclosure: Todd Shriber owns shares of DraftKings.See more from Benzinga Roundhill Brings Carlisles Acquirers Fund Into ETF FoldC 2020 Benzinga.com. Benzinga does not provide investment advice. All rights reserved. 