I think devs does not matter their cryptocurrency, they already have self exchange. Just used ICO as a financing option.
Which self-exchange? They are only listed on Etherdelta, DDex at the moment and don't have a good exchange.
As per their recent medium article they are paying SXDT holders a dividend. Is it for ICO investors only or for all holders?
It is for all SXDT holders. But you must hold tokens on metamask, Ledger nano or Trezor wallet. Although I have a problem with withdrawal from my Trezor. I'm not sure how much it is worth keeping this tokens.
I hold them in my ERC20 compatible wallet. I did not see them mention only these wallets. Can you link me the announcement where it's mentioned?
Spectre tokens are the tokens whose value has been mostly stable so it's definitely worth holding if they pay a dividend.
I am talking about claiming dividend earning, not just hold SXDT
you can check it here: https://rewards.spectre.ai/register