All it takes is one bad apple, or in this case, one bad actor who speaks chinese.
They do this so google bots see it. This gives their website or whatever more ranking. Since its mentioned so frequently. They want to infect sites that have huge numbers of impressions to do this. Infecting a forum that hardly gets traffic will hardly get google/bing/web-spiders to read its infection and spread it.
Its either russian or chinese doing this because those countries actually condone this behavior. It might even be the chinese government and some worker at that company decided to try a few posts on roku. Then when they saw no action being taken to remove their posts or ban them, flood the place into the ground.
it's a common practice. Roku.. you guys need a more active moderation team. You are looking more amateur than these forums people run for fun. You roku forums guys need to do better. Not saying you aren't doing a good job. Saying it can be better, please do better. It's a single person flooding thousands of posts. Get moderators on different timezones. Actually have check-ins required where moderators lose their spot if they dont login every now and then. Simple things.