1 & 2. You're on a salary. You also get paid 70 Euro per diem whilst on tour. You won't get the per diem if you're on home standby.
You do 6 days on, 5 days at home. Scheduling will do their best to get you home on Day 6. I've only had to extend once due to extenuating circumstances.
3. "Greasing up the passengers"????
There is no cockpit door. They can visit you whenever they want and they often do. Usually at Top of Descent crossing into the London area.
You do load the aircraft. You also offer the owners drinks etc if they want. (and you're not on an aircraft with a FA) Generally, they look after themselves.
You also sort the catering and tidy the aircraft if not at airport with company arranged services. Looking after our owners isn't a chore.