Plenty of even quite-large websites just don't get attacked by DDoS attacks, because nobody has any particular reason to attack them.
All large sites regularly get attacked.
The average skiddie’s motivations are that they’re bored. So they DoS a site they use regularly just to see.
Heck they generally don’t even mean to cause damage per-se, and just think it’s a funny use of their evening.
You have to stop thinking DoS attacks are always particularly personal. They really often just aren’t, and it’s a monumental pain in the ass to be on the receiving end.
Well used, but never attacked.