I think it would be nice for Zabbix SIA to see in which enviroment zabbix is running. For example, which OS, NVPS, Database, Users, hosts, etc. also some "user" specific things like in what kind of company is zabbix running.
Idea, every (zabbix server) installation get a uniq token, with this token i can send some data (see above) to zabbix sia, it run via cron once per week/month and which information will send to zabbix sia are transparent and all this is optional..
the benefit is that zabbix have a good overview who zabbix is running