So, what I assume might happen during this pandemic is those people all actually coming back to gamble and that might result with more people gambling. Not that they are forced to gamble, they can still do something else if they want to, but I just feel like many of them may opt to gamble instead and that could raise the numbers.
From this point of view, you are of course right. I related my statement to "new registrations" rather than existing users who are now logging in more often.
I also assume that people will now have more time to play, which will increase both online numbers and casino revenue.
I didn't calculated it but when I visited the site, the number of online users and the betting volume are too up. It's obvious that people are at home with nothing to do on their free time. Gambling is one of the fun activity they could do without any health risk. And bustabit is a cult on its own.
True that, this can also be seen on other gambling sites. However, not only gambling, but also sites such as Facebook or online news services or games such as World of Warcraft are experiencing increased traffic. It is definitely because people in many countries are now forced to stay within their own four walls due to exit restrictions and therefore spend more time online. Gambling sites are definitely one of the big beneficiaries, since increased online activity also means boosted sales. 
