If it helps anyone I registered for TM30 last weekend and got my username and password yesterday meaning it took exactly 7 working days. This is from Bangkok immigration office 2. The tm38 app looks really easy and straight forward. I attached a passport copy and front/back of title deed. No blue book.
TLDR : Answer Summary
The user shared their experience registering for TM30 online, noting that they received their username and password after exactly 7 working days. They submitted a passport copy and the front and back of the title deed without needing a blue book. Other users engaged with questions about the necessity of the blue book and shared additional resources and experiences.