I think SV made a mistake and missed an opportunity here. I've run multiple accounts in EVE and MO1, but you need the hardware for it, and as was said above, it eventually becomes a pain and a chore. SV will get some revenue from it, but I can't imagine it will be significant as I suspect only a small proportion of players will run extra accounts. Most will run the main character they want, and fill in the stuff they can't do from guild mates or the trade broker.
What SV could have done was allow 3 character slots on each account. You start with just one slot open, then buy the 2nd and 3rd at (let's say) $10 each. You also pay an extra $5 per month sub for each extra. That way, the hardcore players who really need to run multiple accounts simultaneously would still do so, but more casual players would be far more likely to spend some extra cash for the extra slots.
