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According to the change history, it looks like the title is wrong and that the offer will be $1.

1.Offer Period. This offer commences at 9:00 AM (AEST) on 2 September 2019 and is valid until 8:59AM (AEST) on 5 September 2019 (“Offer Period”).

2.Eligibility. To be eligible for your first year of eBay Plus for $5, 10:00 AM (AEDT) on 18 December 2019 and is valid until 9:59AM (AEDT) on 20 December 2019 (“Offer Period”).