Almost two years later, I'd amend my previous post to read as follows (prices are for NYC and might be lower in some metro areas):
My impression is:
1. A minority of MF advertisers are therapeutic only. Most of these are priced in the $140-160 range and many perhaps even most are certified/licensed.
2. A majority of MF advertisers are OK with MT and provide HE, occasionally more, possibly depending on attraction or on how many sessions you've had together. Some of these require an upsell for some or all services beyond therapeutic with pants on. At most, probably less than, half of these are certified. Some of the uncertified are nonetheless pretty decent masseurs; some are not.
3. A minority of MF advertisers, usually indicated by a higher price, are more of an escort than a masseur. I'd be surprised if any of these are certified; many are completely untrained and basically stroke or lightly knead your back and butt for a few minutes before getting down to other business. The best of them as masseurs are self-taught to, at best, an amateurish level. Some of the higher priced masseurs, however, do not offer full service but can charge what they do simply because they're hot and, with upsells, you'll end up paying escort prices for a good massage but less than full service or, if you don't pay the upsells, you'll end up paying $200 or more for a mediocre massage and frustration or, at best, a DIY HE. Some lay out the upsells ahead of time; many do not but wait until you're on the table/bed.
4. Some of #2 and most of #3 are on RM as well as MF. Almost nobody from #1 is on RM.
5. Almost all RM advertisers go beyond therapeutic. As with those on MF, for at least some an upsell is involved, especially if the base price is in the $150-180 range.
6. Many RM advertisers are more of an escort than a masseur, as described in #3, especially if the price is $200 or more.
7. Some, maybe half or more, of #3/#6 are on Rentmen as well as RM.
8. There are advertisers on Rentmen that appear to be offering only massage. They are mostly #3/#6 but some might fit better into #2/#5.