I very much like the decision taken by you. But  i like to add this time period should be 20 hours.
1. With this the minnow like me get upvote in 24 hours period. because in 24 hours period, it is difficult to upvote one post every day. We are not the bot, to get the exact time required upvote regularly.
2. With this method, the ninnowsupport bot also be recharged over a period of time gone. Because currently about one week  bot is closed, so everyone in hurry to get upvote on all previous posts. This situation is not more than 7-8 days now.

I welcome all initiative done by @minnowsupport bot project. Thanks for support us.