Is it considered gambling and therefore Haram, if somebody is as example watching a livestream of an esport tournament and they offer you benefits if you guess right who wins. If you guess wrong you lose nothing, but if you guess correct you gain icons and skins. They do it to attract viewers.

In regards to competitions where those competing pay nothing but someone else does, there are different sayings, the jumhoor say it is forbidden and Imam Ibn ‘Uthaymeen said: “As for someone coming from outside and wanting to donate something to one of those who came earlier, then I hope there is no harm in that.” As for me akhi Allah knows best.