Nevertheless, the number of active players decreased to 2.55 million in April and to 2.44 million in May, with a marginal increase the following month, according to Gambling Commission figures.
However, as the pandemic rumbled on, player numbers rebounded and had jumped to 2.8 million by November, in a month when nearly £177 million was spent on slots.
Despite the initial decrease in player numbers, total bets soared over the same period as people spent more time on platforms.
The number of bets on online slot machines rose by 15.5% to 5.16 billion in April from the previous month as the first national lockdown continued.
Bets increased by 2.5% to 5.3 billion in May month-on-month.