I can answer that for you:
Often times the MLS provides us with separate paperwork (and a completely separate “feed”) for sold listings, it’s not just mixed in with a standard IDX feed. Sometimes we are “required” to keep them hosted as separate entities as well.
Many times it requires different authentication as well (VOW rules vs IDX rules)
As for cost -
Sold data feeds are many times larger than active feeds (active being “included”) and the cost to host the average sold “feed” is likely $500-$1,000 per month (REW’s actual cost)
Which includes:
Original parsing, downloading, processing
Hosting / storage
Bandwidth (including CDN bandwidth)
Staff cost to maintain, update feed, servers, cpliance etc
So really - it only makes sense for us to offer any extra feeds at all (active, sold or otherwise) where we are generating “at least” $1,000 (break-even) revenue.
The point being, that the cost of sold data hosting (which is significant) is not baked into our pricing, so we either need to charge for it, or can’t offer it.
I do get the consumer perspective as well, since many consumers think REW is much later than we are: And so in their mind, we should just absorb the cost of hosting data feeds as a cost of business since we’re this “big corporate company” - but we’re not, in comparison to other providers, we’re quite small and in most markets have 5 or fewer customers (though in some major feed markets, we have a lot more customers).
The point is, we don’t have VC funding, partners, backers etc, and can’t run our business on no profit (or operate in feed markets that aren’t profitable). Not complaining about it (we do alright overall) - but we certainly can’t afford to be paying $500-$1,000 to support a feed that a customer is complaining about paying $100 for. Just doesn’t make sense for us.