YES, this bounty is a great success among users! Even if we compare it with the previous promo, this promotion is more popular and captures a larger number of active users. I've learned that up to 50 mining bots can be active on one PC. That's pretty awesome and I hope I'll get into the numbers of luckies to receive a part of the big prize pool.
Sure. Moreover, all the mined coins will remain on your balance. And what concerns the number of active mining bots, I think it depends on the capacity of your PC. But anyway, it's a great opportunity to mine even more.