I invested a little, and was planning to invest more, but I am disappointed in the way that you can not see your tokens show up yet. I mean anyone could set up a site and claim nice things just send the money to this address... yeah right.. Dcorp did a better job on that, my tokens got into Myetherwallet right away.
Some tokens appear in MEW straight away, some you have to add manually or wait. Token balances are created by contracts, and contracts can have different designs. We have published a short explainer on how to see your BET in Mist and in MEW here
https://medium.com/@bitdavy/how-to-see-your-bet-token-6a176e2630a6 hope it's helpful.
Everyone will get their token balances before the token sale ends, tokens are issued automatically, so please be a bit patient.
If you want a detailed explanation about particular design of the contract we use, and why for some contracts you can see the balance straign away, and others you have to add manually, I'll need to talk to the solidity devs.