While SCI/SCIE journals (journals included in the Clarivate indices of Science Citation Index, Science Citation Index Expanded) are the gold list of journals and (my guess) the truly international science community considers only the publications that are published in the SCI/SCIE journals, there are some good or emerging journals which are not in SCI/SCIE. I know that some countries (e.g. Easter European countries) in their idiosyncratic evaluation systems allows the SCOPUS and other publications to count as real publications, as I understand, then the serious and international community considers only SCI/SCIE publications as serious ones which can be counted for the evaluation of research proposals, grant applications and position applications.
But as I said, then there are good journals outside SCI/SCIE as well. E.g. I am trying to do research in the nascent field of Artificial General Intelligence (e.g. there is Third Wave AI Campaign by US DARPA https://www.darpa.mil/work-with-us/ai-next-campaign) and Computational Creativity and I am looking on two journals in their respective fields: Journal of AGI https://content.sciendo.com/view/journals/jagi/jagi-overview.xml and Journal of Computational Creativity https://jcc.computationalcreativity.net/. The first journal has rather long history and it has very high standard as I can judge from the published articles (this is my subjective evaluation, but I believe my gut feelings to distinguish bad research from the good one). But the other journal is still awaiting its first issue.
My senses (trying to be good person) advises me to prepare papers exactly for those 2 journals to support the community (of AGI and CC that is still growing and still awaiting status deserving to them), to support the status of the journal. But as those journals are not included in SCI/SCIE, then rationally thinking it would be waste of energy. Instead I can tweak my papers and submit them to the traditional journals (e.g. Cognitive Systems Research or Physics of Life Reviews by Elsevier).
But it is not an easy decision. When I am seeing that from time to time Journal of AGI still receives very high quality articles, I need to ask - why researcher still submitted to this journal knowing that his or her publication is not counted in the indices?
So - what is the personal economic (mercantile) motivation and benefits to publish in high-standard non-SCI/SCIE journals? I am interested only in the mercantile motivation as I clearly understand the social/emotional/moral motivation.
And just curios - why Journal of AGI is not listed in SCIE? Because it is small-scale journal (articles are published rarely)?