My plan to blitz RaF for the rewards, some questions

[Sservis]

Question 1: What is the delay for upgrading a Starter Edition to a subscribed/normal account?

My understanding so far: Each battlenet can only have one Starter Edition account at a time. My primary batttlenet will be trying to get attached to several new accounts. With the program going away on June 11th, any delay in upgrading an SE will dictate how far before June 11th I need to start the process. My current belief is that within 24 hours after adding subscription time to an SE, the way will be clear for the next one to be added.

Read the announcement carefully. https://worldofwarcraft.com/en-us/news/22938871 I don't know if they edited this or not, although the news text on wowhead and mmo-champion match the current announcement.

To take advantage of the current RAF program, your friend will need to link a qualifying WoW account to yours before June 11, and will have 90 days to purchase game time to trigger any rewards.

It appears that rewards and the possibility to earn them will be available after June 11. Also from the benefits support page, there's an 8 day delay on receiving the reward. https://us.battle.net/support/en/article/11009

Veteran rewards are subject to a waiting period of eight days after the recruit is billed for game time.