Yeah, I'm not sure Id Software, backed by their billion dollar parent company ZeniMax Media, who in turn is backed by their parent company Microsoft, has to live in fear of being exploited by the 165 employees who just signed onto a union.
If the union has no power to influence Id Software, what's the point of the union?
You're trying to minimize the power of the union by quoting dollar amounts, when the whole point of the union is to have power, and the whole point of unionization is to defeat superior dollar amounts by capturing the organizational memory that money cannot buy.
You cannot replace your entire gamedev team at once without destroying what makes your company, your company. You cannot respond to your entire gamedev team refusing to work other than by replacing them or by getting them to stop striking, either by aggressively union-busting or by negotiating with the union. That is the reason unions work at all.