No, it doesn't work that way. They don't raffle off the number of tickets, but when raffling off, they indicate the User ID and their % of winnings. For example, 100 tickets participated in the raffle. User-1 had 99 tickets, and User-2 had only 1 ticket. Accordingly, the ratio is 99% to 1%. The number of tickets doesn't change, but User-1 is manually assigned a value of 0.1% before the raffle, and User-2 is assigned 99.9%, and the number of tickets available, drawn, does not affect at all.
No.
Have you ever read the description of how their lottery is provably fair on their website? Have you ever checked any of the tickets list published in their twiiter? Have you ever verified the winners by yourself?
It seems that you have no idea about how their lottery works.
Every week, they publish the tickets list before the lottery is conducted and they can't decrease the number of your tickets and if they add fake tickets to the pool, they will increase the prize pool.