The more I think about it, the more dubious I am about its effect in terms of increasing the number of mares bred.
Almost all mares that are good enough to earn a reasonable amount of broodmare credits would have been bred from anyway IMO.
In my case, nothing would change except I would be getting some or all of the service fee paid for me. I suspect that would be the most common scenario. I am sure there will be some additional mares bred and some will also be bred to a better stallion than would otherwise have been the case but I believe the overall breeding impact will be less than what I initially imagined.
I think the scheme would be beneficial in terms of increasing the pool of racemares and therefore the ability of mares to race against their own sex and therefore the earning capacity of mares and therefore the value of fillies. The breeding and the racing segments of our one harness racing industry would both derive some benefits as a result of that.