These 2 sites have been here for years doing their promotion through signature campaigns. Also, 777coin does a daily give away of 0.00001000 BTC in the games and rounds section, if posted in a following format. But we have many other gambling sites now due to people coming on the online platform in this work from home time. Some of them would have captured a certain % of market as well.
Bitvest and 777coin are old gambling sites. I am sure to use more and more after they continue to run signature campaigns without pauses and now they keep rolling, but in terms of appearance I am less attractive, what I am comfortable with in gambling sites is Fortunejack with a good interface and they continue to upgrade every time and even their promotions are quite good too in the last few weeks.
I love Fortunejack
Having long time signature campaign doesnt indicate that they are much more better to those who do launch less.All things would vary in terms of marketing yet we know that signature campaigns
are just one of the ways on making out exposure and the rest would really be on promotional stuff like bonuses and contest which would make more some noise.
Also, when it comes to progress then its much more good to see on a site that do continuously trying out their best on giving something new and interesting after all these years
but im not saying that bitvest and 777 arent good because if they do able to last this long then that indicates that they are pretty doing well.