Thankyou, J20, for an enlightening thread! Some of the profiles that you listed have now switched to "Distribute content only". However, of the remainder, three were in my hotlists. Thanks to yourself, I have moved them all to my "dodgy" list.
One common feature is that all of the profiles are of white British SWs. Another is that none of them gives a phone number. The latter alone is no proof of a scam - some very good SWs do not give out their phone number. But it is part of a pattern with the set of profiles that you have listed. And finally, several of them - though not all - express an aversion to French kissing.
If it is a single scammer, or ring of scammers, he/she/they take care to try to create variety to try to disguise the suspected fake feedback. ColHardon has given feedback on five of the profiles; BluesKing, Mo.King, and SandMan_69 on three each; DVLC, Maximus00XXII, Segmenta, and Showman7 on only two; and another 15 accounts give feedback on only one each. If these profiles are scam, you have been very vigilant to have noticed it at all!