The fact that rewards ceases after 7 days is part of how Hive works, it's been like this from day 1 and you knew about it when you started. It wasn't suddenly changed after you joined the chain.

Many people create interesting content and are supported by the community because there is value in their content and it is original. They do not republish content that they have just posted a while ago, like you do. And while there is nothing weird with your content, in fact your lego creations are quite cute, the fact you feel you need to recycle content instead of creating fresh material probably explains why you are getting breadcrumbs.

Curators scout all over the chain for quality material, I know because I curate for OCD as well as Pinmapple. If the quality is there and if you use the correct tags, the curators will find you.

And finally, Hive doesn't work on follow for follow back. It is no surprise that you follow 3000 people and only 1000 are following back. How many of these 3000 people's blog have you visited and commented?

I only made my original comment because I rarely see people who post multiple times a day and with recycle content get good rewards, and those who do quickly get downwvoted and and blacklisted for doing so. There are many people who's been around for a long time but still don't understand this so I thought I'd mention it in case you are one of them. However, it seems that you clearly know what you are doing, so all I can do is to wish you the best.