9 days to 13 days is a fall, I am not saying they are not profiting, and I keep saying that 13 days for 10 million bet is still awesome just getting a bit worse. Plus this was during the pandemic when everyone gambled more, take a look at all the other websites and you will see that other casinos are getting more and more customers.
The restrictions due to the pandemic are already being relaxed extremely, at least here in Europe, there are hardly any countries with curfews any more, many people are working in the office as usual again and therefore have less time for leisure activities such as gambling.
But one should also not ignore the fact that summer now begins in the northern hemisphere. Traditionally, players now spend less and less time online, hanging out in the open and going on vacation.
So I would not interpret too much into a drop of the rate how fast the next 10 Mio are reached
Well, there is that dilemma about gamblers, they are inclined to spend more time outside during summer periods and that is definitely a reason why it could get slow in the casino world, but also let's not forget that there is still pandemic going on outside as well.
Just because rules are changing and you are a bit more free to go outside (still with masks I hope) that doesn't mean everyone would be willing to go outside right away. The virus is still out there, there is still no vaccine and the cure helps you if you are semi healthy anyway and if you are old or have important sickness regarding lungs, you are still pretty close to death. At the end of the day casino world should still be a bit higher than usual, before all of this, because many people are still stuck at home even if not for rules but for their health.