I think it is really possible that we have much more bounty hunter because of this pandemic than the previous years because several of them loss their jobs and as well as they looking for a more convenient work which turns them into cryptos and became a bounty hunter.
A pandemic can be the reason too, but for sure those people who experienced what happened in bounties after the bull run in 2018, a lot of altcoins also dumped and most of the bounty tokens rewards are wasted or it cost nothing anymore.
Most people are staying at home so, they can be more on surfing over the internet like some are working from home with the help of the internet. And also it is like some online games, a lot of online games got a massive increase in players when the lockdowns started the last few months.