I think there's more pressure to use it on self-votes since that opportunity will be gone soon. If you're trying to promote community engagement, I would say smaller delegations for longer periods of time.
Interesting, good to note. Yeah, smaller delegations can reach more people. Thanks for the feedback.
You're welcome! Glad to help out. I appreciate that you're interested in helping Steem grow over the long-term by investing in multiple other people. For what it's worth, abh12345 runs a weekly contest on engagement (and curation), but you can see his numbers for how people engage. There are a lot of worthy and underrated candidates there who might be a good fit for what you're trying to accomplish. Full disclosure, I am on the list, but this isn't a solicitation. Just trying to give you the info.
Thanks for taking an interest. If you'd like any more of my opinions, I'm happy to dispense them. ;)