Don't forget that there are on-going promotions too and contest. Bitsler site owner is still thinking of other ways to increase positive experience in playing in our site. I myself was hooked on increasing my level in Bitsler so I can open the surprise chest every time I level up.
For such very bit site like Bitsler, contest is likely very very high competitive. I don't know which contest you mentioned, but I don't think it is a easy contest to win for newbies, or people whom don't have enough skills, experience on Bitsler, and in gambling generally to win such contest (due to its high competitive levels). For promotions, the signature campaign of Bitsler lasted for years, and only include top-rank users. It is obviously that the campaign, by now, has had good impacts on the site, because its longevity so far (comes from its high quality participants, their good works, and their amazing manager, yahoo62278). They all together via their works guarente the success of both campaign and Bitsler site.
About the contest, what you really need to have is only luck and some bankroll that enough to cover some lose here, without those thing I do not think it is going to work even for other site. Is there any skill included when you gamble cara, dice or multicolor? There is none needed, only luck is everything on gambling
And about yahoo management, you should never doubt anymore, he is very competent and able to manage everything pretty good, so you should never doubt his service