أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Yes indeed its okay.
Yes always indeed
No. I feel it is not okay. You can very well send an email asking them for a feed back or you can ask them to get back in case if they may need your support in future. you may also show your sincere interest in welcoming them in future. In fact if you send a thank you email, it is like insulting the person who unsubscribed.
Sure Yes
agree with answer
