Sorry, my Russian knowledge is too basic to express an opinion, but I managed to understand the topic and voted against it. Now I will try to explain why.
First and most important, this seems like the only High five server left with off files and retail features and not much custom shit. What would happen with people who want to play an active support in pvp and siege? They will leave and activity will be even lower than now.
Second, I honestly do not believe that having gm buff will really improve the activity. In the first post was said that full clans come to new servers and after merge they leave. Do you really believe that a full clan can't organize and level 5-10 supports so they can continue playing on Federation? It is 2023, ppl who played l2 are old now, with very limited time to play. So majority of l2 community is just server hoppers who start a new server, get bored in 1-2 months and leave. No matter what additions are made to Federation, it would never be able to bring the excitement that starting a new server from zero brings. For sure, having to level 5 supports on a server with x15 rates and exp runes and various boosts, is not the reason for people not wanting to continue on Federation. Hell, u can make one char 85 lvl in less than a day there. In my opinion, joining the server and seeing items for hundreds of billions is what could be scaring people away. And there is nothing we could do about it, since a server wipe would kill whatever is left of the community and its totally unnecessary.
Going further, I'd like to point out that GMs are running servers with full buff for at least 6 months in the year, so whoever wants to play with gm buff, can play there, instead of wanting to change Federation and ruining the retail like experience of the players there. Also there is the x1k pvp server, as far as I know, so you can go there and pvp without having to log supports. If it's dead already, like I have heard from some people, then it proves my point that GM buffs aren't helping with bringing and retaining new people on old servers.
There is really no point to make all servers with gm buffs and have none with retail buffer.
Another topic I'd like to bring which probably doesn't help with keeping newbies in Federation, is the bad rates of the server. Okay, exp is x15, adena is x10, but spoil for most things besides basic mats is x1, fortress drop is x1, good quests for farming like mahums are also x1. We can not expect new players to come to a 10 year old server and try to catch up with x1 rates.