Most likely the OB will roll right through to the release. There aren't typically huge release dates for F2P games, they just kinda turn off the code requirement one day.
The last character wipe is the one between closed beta and open beta. Everything you have in open beta will carry through when the game is released. There's usually not account/character wipes between open beta and release in Free-to-play games, especially if they're already letting people buy things with real money.
I made a video on the GC purchasing process:
Ghost Recon Online Community Leader
• How to Submit a Bug Report •
• Contact GRO NA Support •
• Official GRO TwitchTV Livestream •
• Official GRO Facebook •
• Official GRO Twitter •
To clarify. If you were invited to this test any GC that you purchase will be credited back to your account during OB, +20%.
Example:
Closed Beta
Purchase 100 GC
Open Beta
Your account will have 120 GC (100 + 20%)
Reminder this is only for people that were invited to help test the system.