Another instance is the airdrop fever, the airdrop have been ongoing for years now but social media through telegram and Ton blockchain has caused a mass participation of airdrops lately compared to previous times and to crown it all, telegram which is one of the biggest social media platform have even got their own exchange and wallet where it's users can easily purchase Bitcoin and other cryptocurrencies.
Besides Airdrops, I think that Freebitco.in was the website that greatly benefited the Bitcoin community. There are many people who entered the Bitcoin world thanks to Freebitco, there are many people who earned their first satoshis from this website.
freebitco.in is a big platform, and it was blessing to me because even when i don't knew about bitcointalk forum but i was involved in freebitco.in platform and played hi-lo jackpots and a several times i won the weekly lottery, it was really nostalgia for many bitcoin fans, this site is still alive.