Paper tea bags usually contain polypropylene or another plastic so they can be heat sealed shut. They aren’t fully compostable.

The Brave browser was full of ads for crypto currencies last time I looked into it. It hardly seems like a good option for someone who is trying to avoid ads.

Firefish is another fediverse microblogging platform and it has search and quote tweets, but you can’t follow hashtags in your regular timeline (you can set up a separate timeline called an antenna that regularly pulls in posts according to a list of words or hashtags you specify). It also has a tweet deck style layout you can setup and you can easily follow and be followed by mastodon users from a firefish account.

There are other alternatives as well, but this is the one I am most familiar with.