I will start of the discussion with some opinions. Firstly I used minnowbooster extensively in the past, but recently I have become unhappy. Sure they give exposure, but they also take away rightful curation rewards to people who find your content interesting. So I don't like the upvote bots in general

Let's get on the Qurator bot launched recently. Most of the funds Qurator generates goes to leases to support content written by Qurites. A requirement to be part of Qurator is to write good human content and get paid for it. It is a young project and could obviously use some revamp, but that is part of the growth process.

Now a problem the group faced was since all the money for the Qurator project was going to member support, there was no money to start initiatives, like for example get paid moderation of the groups content to ensure high quality. This is why the second Qustodian bot was created, you can see Qurator as the basic membership model with the bot as the premium service.

The mission and vision is to become a full-blown editorial service to filter out the wheat from the chaff.

It requires marketing, but in future if you don't want to waste your time looking through all the new posts, consider the spam, stuff you do not care about then you can simply filter posts by Qurator group members, which is a service on top of steemit we need to build, which again requires money for servers and so forth. You would even have a by content search.

So something like <is followed by Qurator, <tag is money. Instead of trolling through everything.

So each bot has a purpose, the support bot to support quality content, the paid bot to support future initiatives and expand the group. It is always to possible to consider a different funding model.

This is just the initial stab, you would be able to see on the Qustodian blog page, the bot can and will change in future. Simply because it is an upvote bot now, does not mean it cannot be molded to something else in the future.