Board Thread:Roblox help and discussion/@comment-44143780-20191110063246/@comment-35998649-20191110064905

DynaBlocks/GoBlocks was in closed testing, meaning the only users that could play it then were and. Once they settled with ROBLOX (now "Roblox") in 2005/2006, they released it as Open Beta and started to hire employees, which is when employees like and  were hired.

Keep in mind that DynaBlocks and GoBlocks were just very temporary names, since the domain lifetimes for the two sites (before becoming a permanent redirect to roblox.com) were so short, like under a week. They were concepts, not really "old Roblox" stuff but more like "early Roblox development" stuff.