I was able to just top 75,000 points in my IHG account from Erewards. This grants Spire status and with it the right to claim 25,000 bonus IHG points.

That makes this the best use of Erewards in my opinion. Highest status in the IHG program and 100,000 points (75,000 + 25,000 bonus) for $1,890 in Erewards currency. I averaged a little over $175 in Erewards per month so far this year, so I made enough with time to spare.