Let me tell you from the perspective of someone from a small city from a 3rd world country:
WE LOVE TRIBUTE BANDS. Or tribute anything, we love "impersonators" of anything (football players, movie actors...)
If that wasn't an option, we would never have a chance to see anything similar to the greatest acts in the world.
Tribute bands are a way to fulfill that desire of seeing something we can only dream watching from a screen. We see them as a gimmick obvisouly, and it's so fun! Just don't take it so seriously.
There are BILLIONS of people living away from the main centers were artists tour around. There's no such thing as "World Tour", lots os countries and cities don't have a chance.
So, i guess the situation here is that HT got big! Maybe way too big that if feels like they are replacing Linkin Park and i'm pretty sure the guys from HT would never ever even think about it, the public put them in that spotlight, the public is commenting all those awkward things in their videos on youtube. The band itselft is doing a homage and making money from doing it in a great way! They are working.
Maybe they crossed the line of a Tribute band because they got big, that i agree. It just shows how there's a big demand for LP out there.