Spin Rio
Illustration by Lily LK for The Washington Post.
Your first deposit is worth up to $500, while your second is worth up to $1,000.

PlayOJO: Best overall
ATLANTIC CITY, N.J. -- As sports betting has swept across the country with states, casinos and consumers eagerly embracing a new gambling market, internet casino games have grown much more slowly.

Excellent customer support
Those states plus Nevada have online poker.
Live chat available 24/7

However, most sites will give you these funds without an attached wagering requirement, with you then being able to win real cash when using them on their casino games.
There¡¯s everything from live dealer blackjack to game shows like Crazy Time.
DraftKings
Casino Games: 5/5