UPD: The calculation updated, for some reason I filtered only CF style competitions. Now it includes everything. Still ruban best :)

I revisited some data from Codeforces and, after 5 years, decided to calculate again who has participated in the most contests. I took into account all official contest participations, including those where a user participated unofficially. However, I excluded Practice/Virtual contests.

P.S: I think no one will beat ruban ever :)

Rank	Handle	Total	Official	Unofficial
1	ruban	1164	1090	74
2	kmjp	972	547	425
3	dreamoon_love_AA	891	538	353
4	coderbd	867	789	78
5	kzyKT	863	626	237
6	PAG	834	814	20
7	balakrishnan	807	656	151
8	natsugiri	776	544	232
9	uwi	766	467	299
10	_LeMur_	686	552	134
11	Jimanbanashi	640	469	171
12	Gassa	622	463	159
13	eugalt	619	618	1
14	xish	618	573	45
15	Hasan0540	610	425	185
16	leaf1415	606	359	247
17	titia	596	362	234
18	KrK	588	381	207
19	Mukundan314	581	512	69
20	SmartCoder	574	561	13
21	_Dragon_	571	504	67
22	sutekine	566	551	15
23	Golovanov399	556	440	116
24	oversolver	551	367	184
25	Farhod	551	393	158
26	STommydx	548	393	155
27	hank55663	540	369	171
28	Hyperbolic	535	314	221
29	Wandoka	523	410	113
30	I_am_Heisenberg	518	505	13
31	emthrm	515	293	222
32	rainboy	511	372	139
33	dush1729	505	460	45
34	nuip	503	385	118
35	AntiBsayer	500	348	152
36	Um_nik	494	373	121
37	Subhashis_CSE	490	487	3
38	ScarletS	488	415	73
39	Egor	487	363	124
40	Dukkha	485	441	44
41	Zain	482	475	7
42	chemthan	470	324	146
43	akshay_1	469	412	57
44	vladmart	468	335	133
45	Mujahid	468	442	26
46	antguz	465	381	84
47	Kawaii	463	433	30
48	risujiroh	459	305	154
49	naeem4265	459	427	32
50	HopefulSpecialist	454	453	1
51	Ruban_Denic	453	452	1
52	mban259	452	302	150
53	cjoa	450	390	60
54	espr1t	449	410	39
55	kotatsugame	448	251	197
56	1435730	447	438	9
57	TripleM5da	445	310	135
58	KKT_89	443	329	114
59	irmuun	442	329	113
60	BigBag	440	333	107
61	jiangly	439	259	180
62	Nero	439	305	134
63	Go8	439	403	36
64	mjnbcfbot	436	357	79
65	nhho	432	333	99
66	iMurat	429	425	4
67	ei133333	428	277	151
68	_c_k_r_	428	393	35
69	_Subrata	428	390	38
70	SajidZakaria	428	374	54
71	vangtrangtan	427	372	55
72	rsFalse	427	419	8
73	cuiaoxiang	427	205	222
74	Marckess	425	257	168
75	tnaito	424	344	80
76	I_love_Tanya_Romanova	423	301	122
77	tute7627	422	254	168
78	kaiboy	422	410	12
79	Bedoo	419	369	50
80	Nafis.Shahriar	415	385	30
81	ksun48	411	338	73
82	bi11a1	409	379	30
83	rkb_rd	408	398	10
84	codelegend	408	307	101
85	shahidul_brur	405	391	14
86	physics0523	405	280	125
87	Ferume	405	383	22
88	kiyotaka	405	354	51
89	Azat_Yusupov	405	310	95
90	curly_braces	404	346	58
91	shahed_ahmed	402	370	32
92	IceKnight1093	402	281	121
93	darkkcyan	401	301	100
94	Kude	401	211	190
95	Andreasyan	401	282	119
96	tourist	399	348	51
97	Lawali	399	295	104
98	awoo	398	331	67
99	Uzumaki_Narutoo	398	369	29
100	tuananh238	396	353	43