When flash games were first released they were an incredible feat and all were unique in their own way especially games like Pacman or Sonic. Even if these products are not the best, the quality of these games will bring money in the end, because it is a business for them. With more people playing games, the developers need to dish out better and more up to date new products.
Playing online games turned from a hobby to a job for some of them became infuencers through the You Tube channel or some of them becaming developers. The flash online games have been around for quite some time, now the HTML5 tehnology came with more advantages.