The chances of getting something from these events and promotions are proportional to the amount of money you invest. Getting something good on minimal investment, although possible, is highly improbable. With the current event rates if you don't have like 2 - 3k euros to invest you wont get anything worth your money. If you don't have enough funds to go for the things on offer its best to convert it to adena directly and purchase whatever upgrade you are looking to get.
The biggest issue is that these miniscule upgrades people are trying to do are really pointless compared to what player base gear level should really be. In Naia case the server is starved of gear, players are leaving on daily basis and only people you have left are ones that have invested so much they cant quit. Majority of players cant even do content on their level, there is no realistic way of gearing up and most important of all there is no transparency between the game team and the player base. We are all being ignored, even though every single post on this forum is so clear on what the player base is asking for. The game team, outside of just saying - we hear you - is completely silent on what changes, if any, are going to be made.
I returned after 6 years, and to be honest after spending a decent amount of euros see its a bottomless pit for what? Killing some mobs while watching netflix? I have no chance in doing any PvP content just because its so dominated by 3 individuals and everyone else even if they zerg the individuals have nowhere close the gear to compete. And I really have no chance of doing any PvE content past the initial zones / instances unless some whale caries me. Does this bring me joy? Not really.