What to do with mass accounts?

lets say for example i have 10k + accounts and i have the ability to follow, tweet, retweet, favorite and all the other stuff a real person can do using custom bots i made myself. my question is if you were in that position what would you do with the accounts? for example heres a few simple ideas that i have already tried.
1. post a tweet with an affiliate link, then follow a ton of people who follow large niche accounts.
2. sell retweets, or favorites on fiver or bhw
3. use the mass accounts to retweet posts from larger more valuable accounts i own
4. mass tweet niche content with affiliate links
5. mass mention with affiliate links

any other ideas on how to use or monetize these accounts would be great. I am even open to cool ideas that may not directly generate revenue.

6. create a blog some decent content and ads. post a tweet to a blog post then follow a ton of people in the blog niche

You can sell the accounts themselves. Do a little research about how much they are worth based on activity/age/followers etc. Then make another investment. Not saying the Twitter game is dead by any means, but it is an option.