This kind of thing is pointless against a targeted attack. But it can hide you long enough in case of zero-days/fresh unpatched vulnerabilities because attackers will first target the more easily visible victims.
If an attacker knows about some exploit involving someservice.com, which you are using. That attacker will try to find out where he can use that exploit of his. E.g. he might use something like shodan, google or DNS to get a list of users of someservice.com. Those potential victims that turn up in that list will get attacked first. Later on, if that list is used up, the attacker might then look at other means of getting new victims, like e.g. just trying out the exploit on targets where he doesn't know they are vulnerable. So in that case, not being "visible" to an attacker buys you time to fix the vulnerability.
On the other hand, if you are on the attacker's hotlist, he'll try you first and you gain nothing.