If a reader desires to upvote an article which is older than 7 days, the reader can open following website:
https://steem-bounty.com/services/forever
The link of the article which should be upvoted needs to be captured in the search mask.[1]
Then the user have to login using Steemconnect and upvote the post.
The post will then be upvoted. Also comments which are older than 7 days can be upvoted
using this website.[2] This website might be able to ensure that outstanding posts can generate a passive income forever.
References
[1]https://steemit.com/steemhunt/@d-zero/steem-forever-reward-any-post-older-than-7-days-in-2-steps
[2]https://steem-bounty.com/services/forever
Please note that even posts which are older than 7 days can be upvoted by using following website on Steemit: