the project you promote 2years back can still come up and give you awesome reward, delays takes place sometimes that makes project team keep postponing listing on exchanges, imagine promoting a project in 2018 paid you big reward in 2020 after you've already zero your mind that it's over? I want bounty hunters in the house to verify this, true or false??
Anyways, do not underestimate projects you promote a year or two years ago, they can still pay up and secondly do not leave or exit their telegram channel no matter how many years it's been, if you do you might be denied of your rewards
Yes, I have seen projects taking long time before sending the reward tokens but personally I think the reward tokens should be sent as soon as possible. There is alternative way to avoid transfer or selling of reward tokens where the project team can lock the transfer of reward tokens for the desired time through smart contracts.