What happened:: In October 2015 Dooglus edited code for a ponzi script in order to fix some bugs with said ponzi script.
Reference Link: https://bitcointalk.org/index.php?topic=1216193.0;all (archive), https://github.com/dooglus/CryptoPonzi (archive) and https://github.com/dooglus/CryptoPonzi/branches (archive)
It seems that some people feel that "supporting" a ponzi in any way is considered to be scamming, and editing code for a ponzi certainly would fall under the category of "supporting" a ponzi.
Even more people are strongly against the sale of ponzi scripts and the advertising of a ponzi in their signature, which is very similar to the benefits that dooglus has provided.
Additional Notes: The ponzi in question claims to be "risk free" because if not enough people continue to "invest" in the ponzi that you will receive returns via POS staking, however this is simply not true because the CLAMs you send to the ponzi will be used to payout previous "investors" leaving nothing to stake. This means that not only was dooglus supporting a ponzi, but he was supporting a ponzi that was dishonest about the risks involved in "playing" such ponzi.
edit:
Amount Scammed: unknown/TBD/may possibly increase in the future
This completes the first part of my series of the transgressions of Dooglus
Part 1: Dooglus supporting ponzis