Hi there, thanks for good questions :)
All ROI figures are of course after curation. The "upvote window" is now 15 minutes (not 30) and @tipU will upvote new post at 15 minutes mark - so the curation from the upvote is 25% every time.
The current ROI depends on demand for @tipu upvotes. The more voting power @tipu has (above 80%) the higher the ROI.
Just keep in mind that every upvote request is rewarded with @tipu profit sharing tokens so the ROI is like infinite - it just takes time :D
Yesterday 1000 STEEM POWER delegated or invested gave payout of:
0.046 SBD + 0.4 STEEM (0.22 USD), APR: 18.83% .
Delegation link: steemconnect 1000 SP delegation to @tipu.
Please note that your profit can be slightly different (depending on the payout time).Check out https://www.steemprofit.info to compare @tipU with other services.