I bought 200SP and 100 steem that I use for upvotes and SP rentals. Always allowing the balance of SBD/steem to get back to 100 each couple weeks to make sure I'm not loosing money on here. Really thinking of buying another 200SP with the lower price right now.

At 220-240% you might actually be profitable right now. Everyone uses 25% curation, but that isn't actually true. It would be if nobody including the author upvoted before the 30 minute mark. I have a number of people that autovote my posts around 25 minutes so part of the curation comes back to me, plus I upvote when I post which lowers the curation a little. Think that most posts give out around 18% to curation vs the 25% that is expected...and some of the larger accounts on here can get that down to 10% with their own large upvote at 0 minutes. Another advantage of having some voting weight.

Minnowbooster is a great service and one I would highly suggest using whenever possible for a new member. If you can guarantee a profit why wouldn't you pay for a bid?