I think the most important of those numbers is the last one, 0 marketing/pr budget. I've seen ads for viber and line on tv/newspapers etc. and the ads immediate

I think the most important of those numbers is the last one, 0 marketing/pr budget. I've seen ads for viber and line on tv/newspapers etc. and the ads immediately discredited those services for me, as in, if they had enough cash to broadcast TV ads in Turkey(I live there), they were probably handing my data over to anyone for cash, probably (and quite a few of my friends thought similarly). So, for such a service, having no ads/pr might actually be more beneficial.