Making the money in a tournament which allows re-entries doesn't guarantee you a profit. That stands to reason; if you reenter just once, but only min cash, it's virtually a guarantee that you'll take a net loss. Moreover, the more times you reenter, the more likely it is that you'll take a net loss. In my opinion, it never makes sense to reenter a tournament. I didn't come to that conclusion right away, but I got there in the end.
Making the money in a tournament which you didn't reenter should guarantee you a profit. Unfortunately, that isn't the case on PokerStars, at least for their play money tournaments. These tournaments are rare, but they exist. Even rarer are the tournaments where the payout for a min cash is exactly equal to the sum of the buy in and the entry fee, but they also exist. When I min cash in such a tournament, I call it "making the noney" :-)
Yesterday I made the noney in a Limit Razz tournament. To give you an idea how rare that is, I've played 3,488 MTT tournaments in my online poker career, and have only made the noney three times.
style flavor buy_in entry players entries paid place winnings
MTT L27Lo 22000 3000 6 124 24 33 0
MTT Razz 22000 3000 8 93 24 21 25000
MTT Stud HiLo 22000 3000 8 66 12 0 0
delta: $-50,000
2025 balance: $-682,000
2025 blue distance: $682,000
balance: $15,615,303
MTT ITM pct: 40.45 (1411 of 3488)