I noticed that one too. The pandemic is a good blessing for the existing online gambling websites before the pandemic, and also for those who have quickly throught that online transactions would become big during the community quarantines and lockdowns that prohibits people from going outside.
I also noticed many more gambling website promotion and advertising going in for long term. The market competition on online gambling is really tight, and it seems that they're actually profiting a good amount of money.
benefit out on this pandemic situation despite of this hard scenario we are on there are still who do make more revenue or seeing this as a positive situation for them but well lets just accept the reality.
When the time comes that everybody could go outside and theres already a cure to the virus or the vaccine which cant affect humans anymore then we would see the normalized trend.
People would switch back into those things that they had been engaging before specially to those gamblers whom do love on playing with physical casinos.
I guess they won't switch back because this is the new normal for us, COVID-19 will coexist with us but we're immuned to it already thanks to the vaccine (if we're fully vaccinated) that's why wearing a mask would be optional in the future. This pandemic made us realized some things, and that is there's a lot of opportunities online on how to earn money (if you're luck enough in gambling) but not just gambling of course.
People would stick to online gambling because it's less hassle for them and they can do it secretly from their families.