Sorry for the late reply, but I wanted to address your question – I think one misunderstanding is: in a sense there are no Bluesky accounts and there are no Frontpage accounts, there are only atproto accounts. Whether you make a post on Bluesky or Frontpage or Whitewind or Smokesignal, all of them get collected in the same repository. Here is a neat atproto browser which can display this, this is the account of Frontpage founder Tom Sherman and you can find all of his collections there: https://atproto-browser.vercel.app/at/tom-sherman.com

Bluesky still isn’t there yet on that side (and probably won’t, as it would prevent them from generating revenue if someone can just open a server and connect to their network)

I don’t think that’s necessarily true. As fas as I know there are no plans to inject ads, they are planning to create a marketplace for custom feeds (think “premium” feeds) and labelers and such where they would take a cut. You would obviously still be able to purchase access to them from other servers. But this goal seems kinda lofty, not sure if it can be viable.

To complete the network, relays are required on ATProto and apparently could be expensive to host, so right now, it appears the only relay is hosted by BlueSky the company. Which makes things slightly centralized.

A number I’ve seen quoted multiple times now is ~$150 per month to host a relay (Source). Which explains why Whitewind, Smokesignal and Frontpage don’t host one, they are mostly still small projects by individual talented devs, but imo if that number is true, it really doesn’t seem too outlandish that someone might go for it.

There is Bridgy Fed, which bridges accounts over to the other side if they follow the respective Bridgy Fed account on their platform. This is opt-ín though, so you can’t just follow anyone, they need to have followed @ap.brid.gy on Bluesky. To have your interactions bridged you need to follow @bsky.brid.gy@bsky.brid.gy.

If the account you want to follow is not bridged and you are okay with just reading their posts, you can also use a service like RSS Parrot as every Bluesky account also serves as an RSS feed.