That's why I only own .com domains. net and org are probably fine too. You're free to move the domain you own to a different registrar at any time (I'm all on cloudflare now which has no markup, it's great).
Presumably you can freely move your .dev domains between those registrars?
Registries (like Google for .dev, Verisign for .com/.net) set the pricing for domains under their TLDs. Registrars like Gandi add just a very slim markup.