I don't know? Depending what it is I guess. I outsource most stuff so it's hard to say.
I try to avoid services that send too many links, whether it's an old or new site.
Though I've done a few services with about 500 direct links.
I've never had any of my sites sandboxed, that's out of 300+ domains. But I never send a ton of links right after registration. I've sent 10,000 after several months though.