I think CL did a buyback a while ago, there may still be a buy wall up if you want to have a look. From memory, it was something like 4.36 HIVE against a token that originally cost 1 HIVE. Originally a LEO backed fund, revolving around CUB, but obviously busted once CUB went down the Swanee, and founder wound up in an orderly, you were better off than when you started, way.

I don't think either CL or XV got all the tokens back that they issued. XV was a two year time limited token that invested in fifteen of the top fifty cryptos, re-balancing over time to maximise profits. It was intended to buyback all the tokens for HIVE at the end of the investment period. I think it was something like 3.36 HIVE (original cost 1 HIVE) at the buyback. I thought that was a good return and better than if the HIVE had been powered up and earned 9-12% curation plus inflation for the same period. Will probably see another iteration of this when we get into the bear market proper (buy low to sell higher).

SPI has already been mentioned, long-term investment token, originally set up along UK Investment Club lines. Hive backed assets with guaranteed buyback at 95% of price, hard cap at 93,000 tokens, most in circulation. I have a stash and have sold back some once or twice when I wanted to invest in something else.

EDSI also already been mentioned, savings and income token. Hive backed asset and with a whole ecosystem. Supported by weekly Saturday Savers Club community for past five years.

DAB, DBOND and RUG - family of tokens modelled on original SPI/EDSI family but with added knobs on. I don't invest in them myself.

LBI - under new management, modelled on SPI but LEO backed assets. I don't invest myself, but like to follow what the new manager is doing.

None of them exchanged as rewards for being part of a specific community. We're too small for community tokens, simply not enough users to give them value.