Some of you will probably know about tlcontrib already. I would like to ask for new volunteer members to register and upload extra packages, but I am not sure whether something like that is appropriate, as it is a question without any real answers.
No, those types of solicitations, as well-intentioned as they are, would be considered spam.
If you think it through a bit, you begin to see the problem: Everyone thinks their services are useful and of interest to this community. They may be but, if you use that as the criteria, this site would quickly fill up with advertisements, solicitations, and spam. So we really cannot allow that type of activity on these sites.