Ps plus subscription regarding

Ps plus subscription is in offer but I heard many issues . How do ppl handle such

1. During renewal existing users can't get benefits even if offer exist for others

2. U cant stack subscription like buy and use later

3. There is one week buffer period time after subscription end and even such time offer if came can't be utilised

4. If buy during a blackfriday offer and get struck with abv mentioned period u cant get offer benefits