For those who aren't following closely:
Contributions are currently open and Tangrams are available for US$0.05 each.
where you can buy?
More info here in this article: https://medium.com/@tangramd/community-fund-dce1c26f29f1.
I am not a dev, just a fan of Tangram. If you have any questions, you may contact [email protected]. But the following has been confirmed by a developer. This sale began 4 Nov. As of 1 Jan 2019 it is still open, and will remain open for the time being.
This is how you buy: A) Make/use a bitcoin wallet using a client that lets you sign messages (electrum for instance).
B) Send contributions to the bitcoin address available in the above post by GetSneak:
https://bitcointalksearch.org/topic/m.47561662(The address is 3C6DSAJiLdYWpLLzJQgb12RJi45yjeQkXP but check that so that you don't get scammed!)
C) take note of the transaction hash.
D) Choose "sign message" in your wallet client.
E) In the message to sign, enter
1. the date
2. your e-mail address,
3. your nickname and ID (depends upon platform. If you use discord it would be your discord name and discord ID. To get Discord ID, turn on developer mode in Discord settings, left click yourself and choose copy ID – it would be a number like 255543746611335588). I think they would also take Reddit ID or bitcointalk.org ID. Telegram? who knows!
4. The platform where you use that nickname (discord, reddit, bitcointalk.org)
F) Sign the message so you get a signature string, and verify it if you want.
G) Send an e-mail to the contributions address
[email protected]. Include:
1. The transaction hash for your donation.
2. The BTC address you sent from.
3. the complete message you signed earlier (the previous 4 items) with the signature you got after signing. This proves you own the BTC address that sent the funds.
H) Then later you'll get a confirmation back from the devs.
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**EDIT: Your email should look something like this:**
3C6DSAJiLdYWpLLzJQgb12RJi45yjeQkXP [bitcoin address you sent from]
6459058709bce81d07510d3bdf783a9a9daa03312fab0a32585aa69d5797b1ec [the hash]
-----BEGIN BITCOIN SIGNED MESSAGE-----
4th November 2018
[email protected] [YOUR email]
sweet_sneak (408611836972498955)
Discord
-----BEGIN SIGNATURE-----
IEmeyAWdzJcB560qVsNjbBMAPmaQQNamoP4U+4HRTy63Nav9QqhyGF7rAVYaDReDPUDrF2rxuaPm/tZT4OcaJc0=
-----END BITCOIN SIGNED MESSAGE-----