I'm wondering if it allowed/ethical to "promote" ones package on TeX.SE? Evidently I'm talking about free and open-source packages so not with a (direct) financial benefit. The idea is that many programmers write nice (hacky) packages for some need, but fail to attract other users/programmers to use/contribute to these packages.
The idea could be to ask some question like: "How can you do X effectively?" And the answer: "With package Y" (and evidently with a short introduction to the features Y offers). Since answering is open, other programmers can come up with their own package and its features.
Short question: will this practice be supported, or should these questions be closed?