I disagree on that one. Credit should be given for what a specific person did where ever possible. Getting at least some acknowledgement for the work/thought that someone did motivates people and also makes it visible how large the contribution of someone was.
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Yes people who contribute should be acknowledged to become more motivated.
Unfortunately people who bring up issues and make suggestions are more often personally attacked and trolled usually by user who have made very few suggestions on improving the game themselves. In many cases it seems that people are more often discouraged than encouraged.
That is why I would like once more congratulate Osinyagov, Kasarov, Rita Rush and all the other people who have contributed so much in improving the aesthetics of the game.