Out of curiosity; how would lgbt developers be identified in this case? Since sexual orientation is not visible per se and I guess you cannot ask, is one just looking for specific patterns of behavior or dressing etc?
Staffing agencies even have facets in their CRMs/spreadsheets list/search system to quickly identify candidates.
Well, obvious selection bias at play-- only some lgbt people do this.
If any founders/managers/HR people are reading this: I say this as a member of the lgbt community: if sexual orientation is completely irrelevant to the actual work (don't kid yourself, it probably is), then promoting careerist opportunism over irrelevant aspects of one's identity is not helpful. We don't need handouts, we actually need the same level of respect as everyone else. Please stop treating sexuality as being up for exploitation.