2 SC, which I think is a good amount; the 100,000 BC gives you plenty of coins to test games with and the 2 SC is a standard amount to receive. Scratch card apps have the best scratch cards to buy with bonuses.
https://ufr-2020.front5.picapo.net/forums/viewtopic.php?pid=603411
http://forum3.bandingklub.cz/viewtopic.php?f=39&t=1637531
http://strada.bielsko.pl/1_lubelskie/forum/4-zadaj-pytanie/545262-para-kazanman-n-en-kolay-yolu-nedir-canl-tuerk-pokeri#545262
http://881.cz/forum.php?mod=viewthread&tid=22093&extra=
http://www.prepody.ru/topic94683.html
http://www.prepody.ru/topic79220.html
https://www.ww2.site/forum/viewtopic.php?t=68847
http://forum3.bandingklub.cz/viewtopic.php?f=41&t=1304619
https://forum.zweb-apps.xyz/viewtopic.php?t=26939
http://miweii.com/forum.php?mod=viewthread&tid=31817&extra=
http://forum.spolokmedikovke.sk/viewtopic.php?f=3&t=1138903
http://users.atw.hu/tunedthings/viewtopic.php?p=395524#395524