[Case 1]: First one is bitsport-io (
https://bitcointalk.org/index.php?action=profile;u=2424708) which is an alt. of officialbitplay (
https://bitcointalk.org/index.php?action=profile;u=1797092) who scammed participants by changing mode of campaign afterwards from BTC to their worthless token after watching campaign not working out for them and also self-escrowed the campaigns funds.
Proof: Official site of BitPlay Token :
https://www.bitplaytoken.com also contains a link to Bitsport.io (Archive:
http://archive.is/2ySuQ)
[Case 2]: This is another game that I have spotted in Gambling section being posted recently:
https://bitcointalk.org/index.php?topic=5026657.0 (
http://archive.fo/u9WFy) . It looks like a ponzi scheme to me. It was a smart move though to hide it behind the gem story.
OP of thread: Take the red pill (
https://bitcointalk.org/index.php?action=profile;u=762527)