Community servers have been temporarily mutilated (I hope) by the new engine. All maps have to be redone and converted to new file types (.bsp to .vpk), same kinda shit with source to GO. But, you cant just directly convert the files cuz everything will be buggy. Alotta peoples' favorite maps that they played on csgo (even tf2) jailbreak were ports from source. It will just take some time for CS2 to rebuild its community, but I'm sure you'll see active community servers within 2 months. I just hope the community will be as dedicated to porting as many memorable maps to CS2 at the same extent that all other communities did back during the era of CS:GO jb, surf, bhop, kz, ze, ttt, awp, 1v1, etc...