I make sure each time I'm on Facebook to comment on some conservative page that there is no reason for conservatives to not have mirror accounts here to improve the number of users and the amount of content available to us as well as improve visibility for them.
If you use both platforms still, you should do the same, particularly in the comments on posts about Facebook banning and censorship of popular conservative personalities.
Emphasize not that they abandon Facebook or Twitter, but rather that they market and share content here as well.