It got to be serious problem, not down for maintenance. Take your picks ranging from ransomware or breached. 1st, that site is not a forum/community site. 2nd, that site makes $ from customers buying plays daily or subs for even more $ and that types of site DOESN'T take down for maintenance during business hours. 3rd, that types of sites go down for maintenance during off-peak hours like 11pm - 8am ET when there's no more actions at least for U.S.
Sportsbook like Westgate, Circa, WH in Vegas don't go down for maintenance during peak hours unless NO CHOICE.