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The prestige of a website is determined not by the strength of its team, but by the number of players in general and the number of good players in particular.
Interportals are just for fun, not a targeted event.
Continuing a protectionist policy can lead to banning "outsiders" from participating in the top league and qualifying rounds. We are training the website's team. Skill grows much faster in conditions of fierce competition, and subsidies to individual players only slow down progress.
Judging by the current trends, in the future the community will become more and more mixed, and it will be difficult to determine the party affiliation of many players.
And in international tournaments, I think it is worth completely ignoring local group affiliation and fielding the strongest team possible.