Option 1 mostly. I think it's also worth taking into consideration one thing.
People on Signal tend to have much less volume of overall messages and groups.
For someone on WhatsApp to forward you the invite is a hassle for them, sure, but it is an infinitesimal unnoticeable increment on how many in/out messages they deal with in a day.
As I mention in another thread, people will complain that they "have too many apps" if you pitch Signal as a privacy app. They would install it instantly if you told them the emojis are funnier or whatever. Because they already installed 300+ apps and one more is actually .3% increment ; whereas for your typical GrapheneOS F-droid person, adding whatsapp would be a +15% increase of apps on their homepage.
It's kind of the same with those WhatsApp groups. There will be 1,000 messages in the group this week/month. 3 of those are the actual invite you need, and if you have actual human connections with folks, someone will send you those.
People on Signal tend to have much less volume of overall messages and groups. For someone on WhatsApp to forward you the invite is a hassle for them, sure, but it is an infinitesimal unnoticeable increment on how many in/out messages they deal with in a day.
As I mention in another thread, people will complain that they "have too many apps" if you pitch Signal as a privacy app. They would install it instantly if you told them the emojis are funnier or whatever. Because they already installed 300+ apps and one more is actually .3% increment ; whereas for your typical GrapheneOS F-droid person, adding whatsapp would be a +15% increase of apps on their homepage.
It's kind of the same with those WhatsApp groups. There will be 1,000 messages in the group this week/month. 3 of those are the actual invite you need, and if you have actual human connections with folks, someone will send you those.